Abstract: A coated steel material including: a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, wherein the coating layer has a predetermined chemical composition, and, in a backscattered electron image of the Zn—Al—Mg alloy layer that is obtained at a time of observing the surface of the Zn—Al—Mg alloy layer after polishing to ½ of the layer thickness, under a scanning electron microscope at a magnification of 100×, Al crystals are present, and the average value of the cumulative circumferential length of the Al crystals is 88 to 195 mm/mm2.

Abstract: This hot-rolled steel sheet has a predetermined chemical composition, in a microstructure, in terms of area%, residual austenite is less than 3.0%, ferrite is less than 15.0%, and pearlite is less than 5.0%, an E value that indicates periodicity of the microstructure is less than 10.7, and an I value that indicates uniformity of the microstructure is less than 1.020, a standard deviation of a Mn concentration is 0.60 mass% or less, and a tensile strength is 780 MPa or more.

Abstract: A plated steel including a plated layer on a surface of a steel, in which Expression 1 of 0?Cr+Ti+Ni+Co+V+Nb+Cu+Mn?0.25 and Expression 2 of 0?Sr+Sb+Pb+B+Li+Zr+Mo+W+Ag+P?0.50 are satisfied, and Expression 3 of I(MgZn2 (41.31°))/I?(MgZn2)?0.265 and Expression 6 of 0.150?{I(MgZn2 (20.79°))+I(MgZn2 (42.24°))}/I?(MgZn2) are further satisfied in an X-ray diffraction pattern of a surface of the plated layer measured using Cu-K? rays under a condition that an X-ray output is 40 kV and 150 mA.

Abstract: The welding operation monitoring system includes an image capturing device that is disposed on a side opposite to a side to which the plasma flow is supplied out of a pipe inside and a pipe outside of the strip-shaped steel sheet formed in a tubular shape, and is configured to capture a color image including a plasma flow over the V-shaped region; and a welding operation monitoring device that is configured to generate a specific color component image obtained by extracting a specific color component from the color image, and specifies a V-shaped display region, which is a region corresponding to the V-shaped region within the color image, on the basis of the V-shaped region shown in the specific color component image, thereby analyzing a state of the welding operation.

Abstract: Aluminum nitride particles which are excellent in high thermal conductivity and useful as a filler for a heat dissipating material and which have good fluidity for improving the fillability, that is, spherical AlN particles containing Zr atoms with respect to Al atoms in an amount of a molar ratio Zr/Al=4.0×10?4 to 4.2×10?2, having an AlN conversion rate of 70.0% or more, and having a circularity of 0.85 to 1.00.

Abstract: This hot-dip galvanized steel sheet includes: a steel sheet; a boundary layer provided on the steel sheet; and a hot-dip galvanized layer provided on the boundary layer, in which the steel sheet has a predetermined chemical composition, in a region between a surface of the steel sheet and a depth of 25 ?m from the surface of the steel sheet, an average grain size exceeds 4.0 ?m, in a region between a position of 50 ?m from the surface of the steel sheet and a position of 100 ?m from the surface of the steel sheet, an area ratio of unrecrystallized ferrite is 50% or more, and in the hot-dip galvanized layer, a maximum value of a U concentration is 0.05 mass % or more.

Abstract: A subframe (100) includes a base member (110) and a first member (121). The base member (110) is a channel-shaped member that includes a base surface portion. (111) and two wall portions (112) on both sides of the base surface portion (111) in a vehicle length direction and is open on its lower side in a vehicle height direction. The first member (121) includes a bottom wall portion (121g), a top wall portion (121t), and a side wall portion (121s). The bottom wall portion (121g) and the top wall portion (121t) are disposed in the same direction as the base surface portion (111). The top wall portion (121t) is overlapped on and joined to the base surface portion (111). The wall portions (112) and the bottom wall portion (121g) form the channel shape. The side wall portion (121s) is a wall that blocks a vehicle width direction between the bottom wall portion (121g) and the top wall portion (121t).

Abstract: The steel pipe according to the present disclosure contains a chemical composition consisting of, in mass %, C: 0.25 to 0.50%, Si: 0.05 to 0.50%, Mn: 0.05 to 1.00%, P: 0.025% or less, S: 0.0050% or less, Al: 0.005 to 0.100%, Cr: 0.30 to 1.50%, Mo: 0.25 to 3.00%, Ti: 0.002 to 0.050%, N: 0.0010 to 0.0100% and O: 0.0030% or less, with the balance being Fe and impurities. The steel pipe contains an amount of dissolved C within a range of 0.010 to 0.050 mass %. The tensile yield strength in the axial direction and the circumferential direction is 862 to 965 MPa, and the yield ratio in the axial direction is 90% or more. The tensile yield strength in the circumferential direction is 30 to 80 MPa higher than the compressive yield strength in the circumferential direction.

Abstract: A disclosed threaded connection for steel pipes includes a pin and a box. The pin includes, in order from a front end of the pin toward a pipe body of the pin, an annular shoulder surface, an annular sealing surface located adjacent to the shoulder surface, and a male thread part. The box includes, in order from a pipe body of the box toward a front end of the box, an annular shoulder surface, an annular sealing surface located adjacent to the shoulder surface, and a female thread part. The pin shoulder surface and the box shoulder surface incline from a plane perpendicular to a pipe axis in a direction of screwing the pin. A diameter of an inner circumferential edge of the pin shoulder surface is smaller than a diameter of an inner circumferential edge of the box shoulder surface.

Abstract: A Ni-plated steel sheet includes a base steel sheet and a Ni-based coating layer that is disposed on a surface of the base steel sheet. The Ni-based coating layer includes a Fe—Ni alloy region that is formed on the surface of the base steel sheet. The Fe—Ni alloy region includes a mixed phase composed of a bcc phase and an fcc phase, and a component of the Fe—Ni alloy region includes 5 mass % or more of Fe and a remainder including 90 mass % or more of Ni.

Abstract: A strength flanging method which improves the method of stretch flanging by press forming so as to disperse strain generated during a forming operation in a blank and in turn prevent the formation of cracks at the center of an arc part, which strength flanging method performs stretch flanging using a stretch flanging tool provided with a top surface part having a protruding part in a top view, straight wall parts, a main slanted wall part between the top surface part and the straight wall parts positioned forming an angle with the top surface part of more than 0° and less than 90° and with the straight wall parts of 10° or more and less than 90° and having two intersecting ridgelines at the straight wall part sides, a first sub slanted wall part sharing one ridgeline among the two ridgelines with the main slanted wall part and positioned forming angles with the top surface part and a straight wall part of more than 0° and less than 90°, and a second sub slanted wall part sharing the other ridgeline among the

Abstract: This hot rolled steel sheet has a predetermined chemical composition, in which the microstructure contains, by area%, polygonal ferrite: 2.0% or more and less than 10.0% and the remainder in the microstructure: more than 90.0% and 98.0% or less, and a correlation value that is obtained by analyzing the remainder in the microstructure in a SEM image of the microstructure is 0.82 to 0.95, and a maximum probability value is 0.0040 to 0.0200.

Abstract: The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is % Mg and the amount of Al is % Al, % Mg/% Al is 0.80 or more, and a metal structure in a total field of view of 25,000 ?m2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area % of a MgZn2 phase, 10 to 30 area % of an Al—Zn phase with a Zn content of 10% or more, 0 to 15 area % of an Al phase with a Zn content of less than 10%, and 25 area % or more of an Al/MgZn2/Zn ternary eutectic structure.

Abstract: Provided is a thermally activated delayed fluorescence organic EL device having high emission efficiency and a long lifetime. An organic EL device comprising light emitting layers between an anode and a cathode opposite to each other; wherein at least one of the light emitting layers contains, as a thermally activated delayed fluorescence material, a compound in which a boron-containing electron acceptor backbone is linked with an electron donor backbone having a specific fused ring structure; and the compound is represented by the following general formula (1) where X1 is O or S.

Abstract: This steel sheet has a predetermined chemical composition, in which a microstructure at a ¼ depth position of a sheet thickness from a surface of the steel sheet contains, by volume fraction, ferrite: 0% to 50%, residual austenite: 6% to 30%, bainite: 5% to 60%, tempered martensite: 5% to 50%, fresh martensite: 0% to 10%, and pearlite: 0% to 5%, at the ¼ depth position of the sheet thickness from the surface, a number proportion of the residual austenite having an aspect ratio of 2.0 or more to an entire residual austenite is 50% or more, and a number density of inclusions and precipitates having a grain size of 1 ?m or more is 30/mm2 or less, and at a 1/20 depth position of the sheet thickness from the surface, an average interval between Mn-concentrated portions in a direction perpendicular to a rolling direction is 300 ?m or less, and a standard deviation of Mn concentrations in the residual austenite is 0.40% or less.

Abstract: This hot-rolled steel sheet has a predetermined chemical composition, in a microstructure, in terms of area %, residual austenite is less than 3.0%, ferrite is 15.0% or more and less than 60.0%, and pearlite is less than 5.0%, an E value that indicates periodicity of the microstructure is 10.7 or more, and an I value that indicates uniformity of the microstructure is 1.020 or more, a standard deviation of a Mn concentration is 0.60 mass % or less, and a tensile strength is 980 MPa or more.

Abstract: An internal oxidation starting temperature, estimation device estimates an internal oxidation starting temperature which is a minimum temperature required for an internal oxide layer to grow on a surface of an easily oxidizable element-containing hot-rolled steel sheet including Si, Mn, or Al or any combination thereof. The internal oxidation starting temperature estimation device includes an internal, oxidation starting temperature estimation unit that estimates the internal oxidation starting temperature on the basis of concentrations of the Si, the Mn, and the Al included in the easily oxidizable element-containing hot-rolled steel sheet.

Abstract: This steel sheet has a predetermined chemical composition, at a depth position of ¼ of a sheet thickness from a surface, an area fraction of GAM0.5-1.7 is 50% or more and 100% or less, an area fraction of GAM>1.7 is 0% or more and 20% or less, an area fraction of GAM?0.5 is 0% or more and less than 50%, an area fraction of residual austenite is 0% or more and less than 4%, a total area fraction of the residual austenite, fresh martensite, cementite and pearlite is 0% or more and 10% or less, an average grain size is 15.0 ?m or less, an average dislocation density is 1.0×1014/m2 or more and 4.0×1015/m2 less, a total of pole densities of {211}<011> and {332}<113> in a thickness middle portion is 12.0 or less, and a tensile strength is 980 MPa or more.

Abstract: This wound core (10) is a wound core (10) including a portion in which grain-oriented electrical steel sheets (1) in which planar'portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction and formed by stacking the grain-oriented electrical steel sheets (1) that have been individually bent in layers and assembled into a wound shape, wherein, when an average height of a roughness curve element in a width direction intersecting the longitudinal direction forming a surface of the bent portion (5) of the grain-oriented electrical steel sheet (1) is Ra(b) and an average height of a roughness curve element in a width direction forming ,a surface of the planar portion (4) of the grain-oriented electrical steel sheet (1) is Ra(s), the relationship of 1.00<Ra(b)/Ra(s)?5.00 is satisfied.

Abstract: This high-strength steel sheet contains predetermined chemical components, in a range from a surface to 1/10 of a sheet thickness in a sheet thickness direction, an average pole density of an orientation group 1 that is an orientation group expressed by ?1=0° to 90°, ?=50° to 60° and ?2=45° in terms of an Euler angle is 1.5 or less, an average pole density of an orientation group 2 that is an orientation group expressed by ?1=450 to 85°, ?=85° to 90° and ?2=45° in terms of the Euler angle is 1.5 or more, an S value that indicates a degree of randomness of surface properties is 7.5 or less, an E value that indicates a degree of concentration of the surface properties is 0.04 or more, and a tensile strength is 590 MPa or more.