Abstract: A stock shape for a downhole tool component includes a magnesium alloy including a phase containing 70 to 95 wt. % of magnesium in which 0 wt. % or more and less than 0.3 wt. % of a rare earth metal, a metal material other than the magnesium and the rare earth metal, and 0.1 to 20 wt. % of a degradation accelerator are distributed, and the stock shape has an average particle size of the metal material of 1 to 300 ?m, tensile strength of 200 to 500 MPa, and a degradation rate in a 2% potassium chloride aqueous solution at 93° C. of not less than 20 mg/cm2 and not greater than 20000 mg/cm2 per day. Accordingly, a downhole tool having high strength and being readily degradable is established.

Abstract: A method of strengthening a dilute magnesium alloy sheet includes providing a dilute magnesium alloy sheet, which includes a magnesium alloy consisting essentially of (wt %): >0 to 3.0 of Zn; >0 to 1.5 of Ca; 0 to 1.0 of Zr; 0 to 1.3 of a rare earth element or mixture of the same; 0 to 0.3 of Sr; 0 to 0.7 of Al, the balance of Mg and other unavoidable impurities, wherein the total weight % of alloying elements is less than 3%; subjecting the dilute magnesium alloy sheet to plastic deformation, in which the tensile plastic strain should exceed 0.5%, but be less than 8% to form a pre-deformed magnesium alloy sheets; and subjecting the pre-deformed magnesium alloy sheets to an ageing treatment in a temperature range of 80 to 250° C. for at least 1 minute, thereby forming a strengthened magnesium alloy sheet.

Abstract: The invention relates to a magnesium alloy containing (in % by weight) more than 0.0 to 7.0% zinc, optionally more than 0.0 to 1.0% zirconium, optionally more than 0.0 to 1.0% calcium, optionally more than 0.0 to 1.0% manganese, optionally more than 0.0 to 0.5% silicon, optionally more than 0.0 to 1.0% silver, a max. up to 0.5% aluminum and at least one element selected from the group comprising more than 0.05 to 0.6% yttrium, more than 0.05 to 4.0% ytterbium, more than 0.05 to 4.0% gadolinium, with the residue being magnesium and impurities due to production. The invention also relates to a use of a magnesium alloy of this type and an implant therefrom and a method for producing a body of a magnesium alloy according to the invention.

Abstract: The present invention provides a magnesium alloy material, having superior mechanical properties without using special production equipment or processes, and a production process thereof. The magnesium alloy material of the present invention composed of an Mg—Zn—RE alloy comprises essential components in the form of 0.5 to 3 atomic percent of Zn and 1 to 5 atomic percent of RE, with the remainder comprising Mg and unavoidable impurities. The Mg—Zn—RE alloy has a lamellar phase formed from a long period stacking ordered structure and ?-Mg in the alloy structure thereof. The long period stacking ordered structure has at least one of a curved portion and a bent portion and has a divided portion in at least a portion thereof. Finely granulated ?-Mg having a mean particle diameter of 2 ?m or less is formed in the divided portion.

Abstract: A method of casting a metal ingot with a microstructure that facilitates further working, such as hot and cold rolling. The metal is cast in a direct chill casting mold, or the equivalent, that directs a spray of coolant liquid onto the outer surface of the ingot to achieve rapid cooling. The coolant is removed from the surface at a location where the emerging embryonic ingot is still not completely solid, such that the latent heat of solidification and the sensible heat of the molten core raises the temperature of the adjacent solid shell to a convergence temperature that is above a transition temperature for in-situ homogenization of the metal. A further conventional homogenization step is then not required. The invention also relates to the heat-treatment of such ingots prior to hot working.

Abstract: Magnesium alloys comprising a long period stacking order (LPSO) phase having an 14H-i or an 18R-i structure are provided. The alloys comprise magnesium as a majority element, a first alloying element that is larger than magnesium and a second alloying element that is smaller than magnesium. The first alloying elements include non-rare earth elements.

Abstract: The invention offers a magnesium alloy sheet having excellent warm plastic formability, a production method thereof, and a formed body produced by performing warm plastic forming on this sheet. The magnesium alloy sheet is produced by giving a predetermined strain to a rolled sheet RS that is not subjected to a heat treatment aiming at recrystallization. The sheet is not subjected to the foregoing heat treatment even after the giving of a strain. The strain is given through the process described below. A rolled sheet RS is heated in a heating furnace 10. The heated rolled sheet RS is passed between rollers 21 to give bending to the rolled sheet RS. The giving of a strain is performed such that the strain-given sheet has a half peak width of 0.20 deg or more and 0.59 deg or less in a (0004) diffraction peak in monochromatic X-ray diffraction. The alloy sheet exhibits high plastic deformability by forming continuous recrystallization during warm plastic forming through the use of the remaining strain.

Abstract: A magnesium alloy having high ductility and high toughness, and a preparation method thereof are provided, in which the magnesium alloy includes 1.0-3.5 wt % of tin, 0.05-3.0 wt % of zinc, and the balance of magnesium and inevitable impurities, and a preparation method thereof. Magnesium alloy with a relatively small tin content is added with zinc, and optionally, with one or more alloy elements selected from aluminum, manganese and rare earth metal, at a predetermined content ratio. As a result, the alloy exhibits superior ductility and moderate strength due to the suppression of excessive formation of precipitates and some precipitates hardening effect, respectively. Accordingly, compared to extruded material prepared from conventional commercial magnesium alloys, higher ductility and toughness are provided, so that the alloy can be widely applied over the entire industries including automotive and aerospace industries.

Abstract: A biodegradable Mg-based alloy and implant are provided. The biodegradable Mg-based alloy is represented with a composition equation Mg100-a-b-cZnaLibZrc, wherein a, b, and c of the composition equation are wt % of Zn, Li, and Zr, respectively, and satisfy 0<a?5, 1?b?3, and 0?c?1, respectively.

Abstract: The production of microstructured surfaces in magnesium alloys, containing zinc as the major alloying element, in particular in absorbable implants such as stents, wherein microstructures in sizes of up to 5 ?m (micrometers) are generated on a magnesium alloy base body of the absorbable implant, for example of the absorbable stent, by way of optionally combined, pickling and electrochemical micropolishing processes, and allow better adhesion of a polymer coating (including higher break resistance) and higher corrosion resistance. The microstructured surface is produced out of the bulk material and exhibits no delamination from the base material during the mechanical deformation of the implant.

Abstract: Provided is a Mg alloy, in which precipitated particles are dispersed and which has enhanced tensile strength regardless of the size of the magnesium matrix grains therein.

Abstract: A medical implant and/or device, which includes a biodegradable and cytocompatible magnesium-zinc-strontium alloy is disclosed. The implant and/or device can include a biodegradable and cytocompatible magnesium-zinc-strontium (Mg—Zn—Sr) alloy having a weight percent composition of Zn and Sr as follows: 0.01?Zn?6 wt %, 0.01?Sr?3 wt %. A method for manufacturing an implant in the form of a biodegradable and cytocompatible magnesium-zinc-strontium alloy is disclosed, which includes melting the biodegradable and cytocompatible magnesium-zinc-strontium alloy in an inert environment and molding the biodegradable magnesium-zinc-strontium alloy in a semi-solid state.

Abstract: An alloy and an implant having a three-dimensional structure based on such alloy. The alloy comprises a monophasic MgZn alloy containing from 2.0 wt. % Zn to 6 wt. % Zn, having less than 0.001 wt. % of one or more other elements with the remainder being Mg. In some embodiments, the alloy is substantially free of microgalvanic elements. In some embodiments, the alloy includes a MgZnCa alloy containing nanosized precipitates being less noble than the Mg matrix alloy and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn and a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, having less than 0.001 wt. % of one or more other elements with the remainder being Mg. In other embodiments, the alloy includes a MgZnCa alloy containing nanosized precipitates being less noble than the Mg matrix alloy, a plurality of nanosized precipitates being more noble than the Mg matrix and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn, a calcium content ranging from 0.0005 wt. % to 1.0 wt.

Abstract: An alloy with a high glass forming ability characterized by containing a group of elements A with atomic radii of less than 0.145 nm of a total of 20 to 85 atm %, a group of elements B with atomic radii of 0.145 nm to less than 0.17 nm of a total of 10 to 79.7 atm %, and a group of elements C with atomic radii of 0.17 nm or more of a total of 0.3 to 15 atm %; when the elements with the greatest contents in the group of elements A, group of elements B, and group of elements C are respectively designated as the “element a”, “element b”, and “element c”, by the ratio of the content of the element a in the group of elements A (for example, Zn and/or Al), the ratio of the content of the element b in the group of elements B (for example, Mg), and the ratio of the content of the element c in the group of elements C (for example, Ca) all being 70 atm % or more; and by the liquid forming enthalpy between any two elements selected from the element a, element b, and element c being negative.

Abstract: The present invention provides a process for coating a substrate. A metal alloy layer including at least two metallic elements is continuously deposited on the substrate by a vacuum deposition facility. The facility includes a vapor jet coater for spraying the substrate with a vapor containing the metallic elements in a constant and predetermined relative content, the vapor being sprayed at a sonic velocity. The process may advantageously be used for depositing Zn—Mg coatings. The invention also provides a vacuum deposition facility for continuously depositing coatings formed from metal alloys, for implementing the process.

Abstract: A linear object is composed of a magnesium alloy including, in percent by mass, 0.1% to 6% of Zn, 0.4% to 4% of Ca, and the balance being Mg and incidental impurities, in which, when a creep test is performed on the linear object under conditions of a temperature of 150° C., a stress of 75 MPa, and a holding time of 100 hours, the linear object has a creep strain of 1.0% or less. Zn and Ca interact with each other to improve heat resistance, and thus it is possible to obtain the linear object having an excellent creep property. By incorporating Zn and Ca, in amounts in specific ranges, into the magnesium alloy, it is also possible to obtain the linear object having excellent plastic workability.

Abstract: Magnesium-based hydrogen storage alloys having metallic magnesium (Mg) and a magnesium-containing intermetallic compound (MgxMy wherein y is 1?x) and containing not less than 60 mass-% of magnesium in total, and having a phase of a primarily crystallized magnesium-containing intermetallic compound in its solidification structure.

Abstract: Disclosed is a magnesium alloy material having excellent tensile strength and favorable ductility. Therefore, the magnesium alloy sheet material formed by rolling a magnesium alloy having a long period stacking order phase crystallized at the time of casting includes in a case where a sheet-thickness traverse section of an alloy structure is observed at a substantially right angle to the longitudinal direction by a scanning electron microscope, a structure mainly composed of the long period stacking order phase, in which at least two or more ?Mg phases having thickness in the observed section of 0.5 ?m or less are laminated in a layered manner with the sheet-shape long period stacking order phase.

Abstract: Provided is a composite material suitable for forming a part for continuous casting capable of producing cast materials of excellent surface quality for a long period of time and with which a molten metal is inhibited from flowing into a gap between a nozzle and a moving mold. A composite material (nozzle 1) includes a porous body 2 having a large number of pores and a filler incorporated in at least part of a portion that comes into contact with the molten metal, the portion being part of a surface portion of the porous body. The filler incorporated in the porous body 2 is at least one selected from a nitride, a carbide, and carbon.

Abstract: A magnesium alloy which contains magnesium as a main component and other elements added has a microstructure in which grains surrounded by high angle grain boundaries consist of subgrains and fine particles are dispersed into the subgrains.

Abstract: The present invention relates to a magnesium alloy having controlled corrosion resistance properties, which comprises magnesium (Mg) and an alloying element and includes a magnesium phase and a phase composed of magnesium and the alloying element, wherein the difference in electrical potential between the magnesium phase and the phase composed of magnesium and the alloying element is greater than 0 V but not greater than 0.2 V.

Abstract: A magnesium alloy, comprising: Y: 0.5-10? Zn: 0.5-6?? Ca: 0.05-1?? Mn: ??0-0.5 Ag: 0-1 Ce: 0-1 Zr: 0-1 or Si: 0-0.4, wherein the amounts are based on weight-percent of the alloy and Mg, and manufacturing-related impurities constitute the remainder of the alloy to a total of 100 weight-percent. Also disclosed is a method for manufacturing such an alloy and a biodegradable implant formed therefrom.

Abstract: An implant consisting entirely or in part of a biocorrodible magnesium alloy having the composition Gd: 2.7-15.0 wt %, Zn: 0-0.5 wt %, Zr: 0.2-1.0 wt %, Nd: 0-4.5 wt %, Y: 0-2.0 wt %, where magnesium and impurities due to the production process account for the remainder to a total of 100 wt %.

Abstract: The present invention provides a method for producing a magnesium alloy sheet capable of producing a magnesium alloy sheet having excellent plastic workability such as press workability. The method of the present invention includes rolling a magnesium alloy blank with a reduction roll. The rolling includes controlled rolling performed under the following conditions (1) and (2) wherein M (% by mass) is the Al content in a magnesium alloy constituting the blank: (1) the surface temperature Tb (° C.) of the magnesium alloy blank immediately before insertion into the reduction roll satisfies the following expression: 8.33×M+135?Tb?8.33×M+165 wherein 1.0?M?10.0; and (2) the surface temperature Tr of the reduction roll is 150° C. to 180° C.

Abstract: An Mg base alloy of this invention is characterized in that Ag is contained in an amount of not more than 1.98 at % as an additive material other than Zn. There is provided an Mg base alloy having not only a practically sufficient strength but good ductility at room temperature to an extent that it has hitherto been unable to be desired and having small anisotropy in strength characteristics.

Abstract: An implant consisting entirely or in part of a biocorrodible magnesium alloy having the composition Gd: 2.7-15.0 wt %, Zn: 0-0.5 wt %, Zr: 0.2-1.0 wt %, Nd: 0-4.5 wt %, Y: 0-2.0 wt %, where magnesium and impurities due to the production process account for the remainder to a total of 100 wt %.

Abstract: The invention relates to a process for coating a substrate (S) whereby a metal alloy layer comprising at least two metallic elements is continuously deposited on the substrate (S) by means of a vacuum deposition facility (1) comprising a vapor jet coater (7) for spraying the substrate (S) with a vapor containing the metallic elements in a constant and predetermined relative content, the vapor being sprayed at a sonic velocity. The process is more particularly intended for depositing Zn—Mg coatings. The invention also relates to a vacuum deposition facility (1) for continuously depositing coatings formed from metal alloys, for implementing the process.

Abstract: The present invention relates to a method for depositing an adherent zinc coating onto a zinc-containing magnesium alloy substrate in order to render the surface suitable for electroplating. The coatings are applied from a pyrophosphate-based zinc electrolyte solution containing a small quantity of fluoride ions. Depending on the zinc and aluminum content of the magnesium alloy, the zinc electrolyte solution is applied by immersion deposition or electrolytically.

Abstract: The present invention provides an implant consisting of a biodegradable magnesium-based alloy or partially applied with the magnesium-based alloy, and a method for manufacturing the same. The implant according to the present invention is biodegradable, in which its biodegradation rate can be easily controlled, and the implant has excellent strength and interfacial strength to an osseous tissue.

Abstract: Disclosed is a magnesium alloy material which can be produced without the need of employing any specialized production facility or process and has excellent mechanical properties, particularly high elongation. Also disclosed is a process for producing the magnesium alloy material. The magnesium alloy material comprises a Mg—Gd—Zn alloy comprising 1 to 5 mass % of Zn and 5 to 15 mass % of Gd as essential ingredients, with the remainder being Mg and unavoidable impurities, wherein the Mg—Gd—Zn alloy has a long period stacking structure in its alloy structure and also has Mg3Gd and/or Mg3Zn3Gd2. The process for producing the magnesium alloy material comprises a melting/casting step and a forging processing step for subjecting the casted material to a hot forging processing at a predetermined processing rate.

Abstract: The invention offers (a) a method of producing a magnesium-alloy material, the method being capable of obtaining a magnesium-alloy material having high strength, (b) a magnesium-alloy material having excellent strength, and (c) a magnesium-alloy wire having high strength. A molten magnesium alloy is supplied to a continuous casting apparatus provided with a movable casting mold to produce a cast material. The cast material is supplied to between at least one pair of rolls to perform an area-reducing operation (a rolling operation). The rolling operation is performed such that pressure is applied to the cast material using the rolls from at least three directions in the cross section of the cast material. A magnesium-alloy material obtained through the above-described production method has a fine crystal structure and is excellent in plastic processability.

Abstract: An alloy with a high glass forming ability characterized by containing a group of elements A with atomic radii of less than 0.145 nm of a total of 20 to 85 atm %, a group of elements B with atomic radii of 0.145 nm to less than 0.17 nm of a total of 10 to 79.7 atm %, and a group of elements C with atomic radii of 0.17 nm or more of a total of 0.3 to 15 atm %; when the elements with the greatest contents in the group of elements A, group of elements B, and group of elements C are respectively designated as the “element a”, “element b”, and “element c”, by the ratio of the content of the element a in the group of elements A (for example, Zn and/or Al), the ratio of the content of the element b in the group of elements B (for example, Mg), and the ratio of the content of the element c in the group of elements C (for example, Ca) all being 70 atm % or more; and by the liquid forming enthalpy between any two elements selected from the element a, element b, and element c being negative.

Abstract: As a novel biodegradable metallic material the degradation speed of which in vivo can be controlled over a broad scope while achieving desired mechanical properties such as strength, work hardening and ductility without restricting the shape of an implant device, it is intended to provide a magnesium-based biodegradable metallic material which comprises Mg containing Mg as the major composition and having a concentration of inevitable impurities equal to or less than 0.05 atomic %, is free from precipitates or intermetallic compounds, and has an average grain size being regulated to equal to or less than ¼ of the minimum part of the material.

Abstract: Provided are a heat-resistant magnesium alloy which has at the same time both high strength and high ductility even under high temperature environment and is also inexpensive, and a production process of the heat-resistant magnesium alloy. The heat-resistant magnesium alloy includes, in relation to the total amount of the alloy, 1 to 3 at % of Zn, 1 to 3 at % of Y and 0.01 to 0.5 at % of Zr with the balance composed of Mg and inevitable impurities, wherein the composition ratio Zn/Y between Zn and Y falls within a range from 0.6 to 1.3, an a-Mg phase and an intermetallic compound Mg3Y2Zn3 phase are finely dispersed, and a long period stacking ordered structure phase is formed in a three-dimensional network shape. The heat-resistant magnesium alloy can be produced by melting a metal material having the above-described composition at temperatures within a range from 650 to 900° C., pouring the molten metal material into a mold and cooling the molten metal material at a rate of 10 to 103 K/sec.

Abstract: The invention is to provide a magnesium alloy material such as a magnesium alloy cast material or a magnesium alloy rolled material, excellent in mechanical characteristics and surface precision, a producing method capable of stably producing such material, a magnesium alloy formed article utilizing the rolled material, and a producing method therefor. The invention provides a producing method for a magnesium alloy material, including a melting step of melting a magnesium alloy in a melting furnace to obtain a molten metal, a transfer step of transferring the molten metal from the melting furnace to a molten metal reservoir, and a casting step of supplying a movable mold with the molten metal from the molten metal reservoir, through a pouring gate, and solidifying the molten metal to continuously produce a cast material. In a process from the melting step to the casting step, parts contacted by the molten metal are formed by a low-oxygen material having an oxygen content of 20 mass % or less.

Abstract: Disclosed is a wrought magnesium alloy having excellent strength and extrusion or rolling formability, and a method of producing the same. The wrought magnesium alloy comprises 0.1-1.5 at % group IIIa, 1.0-4.0 at % group IIIb, 0.35 at % or less of one selected from the group consisting of groups IIa, IVa, VIIa, IVb, and a mixture thereof, 1.0 at % or less of group IIb, and a balance of Mg and unavoidable impurities and thus has a second phase composite microstructure. The wrought magnesium alloy of the present invention has high strength, toughness, and formability in addition to the electromagnetic wave shield ability of magnesium. Accordingly, the wrought magnesium alloy is a material useful to portable electronic goods, such as notebook personal computers, mobile phones, digital cameras, camcorders, CD players, PDA, or MP3 players, automotive parts, such as engine room hoods, oil pans, or inner panel of door, or structural parts for airplane.

Abstract: The present invention provides a magnesium alloy material, having superior mechanical properties without using special production equipment or processes, and a production process thereof. The magnesium alloy material of the present invention composed of an Mg—Zn-RE alloy comprises essential components in the form of 0.5 to 3 atomic percent of Zn and 1 to 5 atomic percent of RE, with the remainder comprising Mg and unavoidable impurities. The Mg—Zn-RE alloy has a lamellar phase formed from a long period stacking ordered structure and ?-Mg in the alloy structure thereof. The long period stacking ordered structure has at least one of a curved portion and a bent portion and has a divided portion in at least a portion thereof. Finely granulated ?-Mg having a mean particle diameter of 2 ?m or less is formed in the divided portion.

Abstract: A marker alloy foreign implant made of a biodegradable metallic material and having the composition MgxYbyMz wherein x is equal to 10-60 atomic percent; y is equal to 40-90 atomic percent; z is equal to 0-10 atomic percent; M is one or more element selected from the group consisting of Ag, Zn, Au, Ga, Pd, Pt, Al, Sn, Ca, Nd, Ba, Si, and Ge; and wherein x, y, and z, together, and including contaminants caused by production, result in 100 atomic percent.

Abstract: A magnesium based alloy consists of, by weight: 1.4–1.9% neodymium, 0.8–1.2% rare earth element(s) other than neodymium, 0.4–0.7% zinc, 0.3–1% zirconium, 0–0.3% manganese, and 0–0.1% oxidation inhibiting element(s) the remainder being magnesium except for incidental impurities.

Abstract: A magnesium alloy with formability at room temperature and excellent corrosion resistance is provided. Specifically, a magnesium alloy is provided which comprises, in mass %, 8.0 to 11.0% Li, 0.1 to 4.0% Zn, and 0.1 to 4.5% Ba, with the balance being Mg and unavoidable impurities, the alloy which further comprises 0.1 to 0.5% Al, and the alloy which further comprises 0.1 to 2.5% Ln (a total amount of one or more lanthanoids) and 0.1 to 1.2% Ca.

Abstract: A magnesium alloy with formability at room temperature and excellent corrosion resistance is provided. Specifically, a magnesium alloy is provided which comprises, in mass %, 8.0 to 11.0% Li, 0.1 to 4.0% Zn, and 0.1 to 4.5% Ba, with the balance being Mg and unavoidable impurities, the alloy which further comprises 0.1 to 0.5% Al, and the alloy which further comprises 0.1 to 2.5% Ln (a total amount of one or more lanthanoids) and 0.1 to 1.2% Ca.

Abstract: A magnesium-based alloy containing at least 92 wt % magnesium, 2.7 to 3.3 wt % neodymium, 0.0 to 2.6 wt % yttrium, 0.2 to 0.8 wt % zirconium, 0.2 to 0.8 wt % zinc, 0.03 to 0.25 wt % calcium, and 0.00 to 0.001 wt % beryllium. The alloy may additionally contain up to 0.007 wt % iron, up to 0.002 wt % nickel, up to 0.003 wt % copper, and up to 0.01 wt % silicon, and incidental impurities. The alloy may contain from 0.2 to 0.5 wt % Zn, and from 0.03 to 0.15 wt % Ca, and 2.9-3.2 wt % Nd, 1.9-2.1 wt % Y, 0.3-0.5 wt % Zr, 0.2-0.4 wt % Zn, and 0.03-0.12 wt % Ca.

Abstract: An alloy feedstock for semi-solid metal injection molding. The alloy feedstock is an alloy material in particulate form and has a heterogeneous structure, a temperature range at 20% of the height of the peak of the main melting reaction greater than 40° C., and having a ratio of the height of the peak of the eutectic reaction to the height of the main melting reaction of less than 0.5.

Abstract: A process for producing a refined magnesium material which is flame retardant by adding an alkaline earth metal. In the process, the dross in a thin film is formed on the surface of the molten magnesium material by contacting it with a dross-formable atmosphere gas while the molten magnesium material is subjected to a vertical vortex flow. The dross encloses the impurity floating on the surface of molten magnesium material through the vortex flow in a vertical direction. The resultant dross is accumulated at the corner of the crucible to prevent the re-diffusion of the impurity. The continuous application of the vortex flow against the molten magnesium material causes the thin film of dross to be continuously formed on the molten magnesium material and adhered thereto so as to enclose the impurity each time it is formed. Accordingly, the molten magnesium material is improved in cleanliness or refined.

Abstract: A magnesium alloy material includes magnesium; more than 1 wt. % manganese; and at least one sp-metal selected from the group consisting of zinc, cadmium, mercury, gallium, indium, thallium, germanium, tin, lead, arsenic, antimony, and bismuth, wherein the manganese and the at least one sp-metal together are a maximum of 5 wt. % of the alloy material. The magnesium materials are resistant to corrosion and are especially useful in articles exposed to aqueous electrolytes during use or production.

Abstract: A magnesium base alloy for high pressure die casting (HPDC), providing good creep and corrosion resistance, comprises: at least 91 weight percent magnesium; 0.1 to 2 weight percent of zinc; 2.1 to 5 percent of a rare earth metal component; 0 to 1 weight percent calcium; 0 to 0.1 weight percent of an oxidation inhibiting element other than calcium (e.g., Be); 0 to 0.4 weight percent zirconium, hafnium and/or titanium; 0 to 0.5 weight percent manganese; no more than 0.001 weight percent strontium; no more than 0.05 weight percent silver and no more than 0.1 weight percent aluminum; any remainder being incidental impurities. For making prototypes, gravity (e.g. sand) cast and HPDC components from the alloy have similar mechanical properties, in particular tensile strength. The temperature dependence of the latter, although negative, is much less so than for some other known alloys.

Abstract: A magnesium alloy having a high strength and elongation, comprising by weight, 4.3-10.0% aluminum, 0.7-6.0% zinc, 0.4-5.0% silicon, 0.025-5.0% phosphorus, up to 0.7% copper, with the substantial balance being magnesium.

Abstract: This invention aims to provide a nitriding method of forming a relatively thick nitride layer on the surface of an aluminum material containing silicon, and an auxiliary agent for nitriding. By using a nitriding auxiliary agent mainly comprising aluminum containing a metal such as lithium or boron, which has a high bonding strength with oxygen, coexists with silicon to form substantially no silicide, or a nitriding auxiliary agent mainly comprising an Al--Mg--Cu alloy or an Mg--Zn--Cu alloy, heat treatment is applied by nitrogen gas with the aluminum material to be nitrided contacted with the nitriding auxiliary agent. Hence, a thick nitride layer can be easily formed even on the surface of an aluminum material containing silicon, and this is most suitable to surface nitride aluminum-silicon alloys, which possess superior castability.

Abstract: A magnesium based alloy exhibiting superior elevated-temperature properties such as creep resistance and tensile strength and die castability such as reduced hot-cracking and die-sticking, contains about 2 to 9 wt. % aluminum, 6 to 12 wt. % zinc, 0.1 to 2.0 wt. % calcium, optionally 0.2 to 0.5 wt. % manganese, and the balance comprising magnesium. The alloy includes the intermetallic compound Mg--Al--Zn--Ca at the grain boundaries of the magnesium crystals. The alloy according to this invention may have a creep extension of less than about 0.6% at the tensile stress of about 35 MPa and the temperature of about 150.degree. C., and a tensile yield strength of at least 110 MPa at the temperature of about 150.degree. C. The alloy is particularly useful in die casting applications.

Abstract: A magnesium Mg--Al--RE magnesium alloy wherein an amount of a rare earth component may be reduced while optimial tensile strength and durability are obtained. The Alloy further includes a small calcium component. A high degree of creep resistance is obtained. Further, additional copper and/or zinc components may be introduced together, or singly for providing favorable tensile characteristics to the alloy material.