Abstract: The present disclosure relates to an aluminum alloy material, and specifically to a weldable in-situ nano-strengthened rare-earth metal (REM)-containing aluminum alloy with high strength and toughness and a preparation method thereof. In the present disclosure, in-situ nano-ceramic particles and REMs simultaneously introduced into an Al—Zn—Mg alloy can effectively refine the grains and significantly improve the strength and toughness of the alloy; and REM-containing nano-precipitated phases and in-situ nanoparticles distributed in the grains or at grain boundaries can also significantly increase a recrystallization temperature of the alloy, effectively inhibit the dynamic recovery, reduce the re-dissolution of alloying elements, and improve the weldability of the alloy.

Abstract: An aluminum alloy flux-cored welding wire and a fabrication method thereof are provided. In the present disclosure, a mixed salt is used as a filler for the flux-cored welding wire, and a reaction between the mixed salt and a welding base metal is directly induced through welding heat to produce in situ nanoparticles, which not only reduces a production cost of the welding wire, but also enhances the bonding between the added particles and the base metal through the prominent wettability between the in-situ enhancement particles and the base metal; and a rare earth element is added to significantly refine grains, which provides a new idea for the selection of a flux-cored welding wire for 7XXX aluminum alloy welding.

Abstract: An aluminum alloy flux-cored welding wire and a fabrication method thereof are provided. In the present disclosure, a mixed salt is used as a filler for the flux-cored welding wire, and a reaction between the mixed salt and a welding base metal is directly induced through welding heat to produce in situ nanoparticles, which not only reduces a production cost of the welding wire, but also enhances the bonding between the added particles and the base metal through the prominent wettability between the in-situ enhancement particles and the base metal; and a rare earth element is added to significantly refine grains, which provides a new idea for the selection of a flux-cored welding wire for 7XXX aluminum alloy welding.

Abstract: An AMC, and in particular to an AMC with high strength, high toughness, high thermal conductivity, and good weldability for a 5G base station and a preparation method thereof. A strip of the AMC with high strength, high toughness, high thermal conductivity, and good weldability for a 5G base station can be prepared by an electromagnetically and ultrasonically-controlled twin-roll continuous casting device developed and designed based on chemical composition designing, in-situ nanoparticle strengthening and refinement, and REM microalloying.

Abstract: The present disclosure relates to an aluminum alloy material, and specifically to a weldable in-situ nano-strengthened rare-earth metal (REM)-containing aluminum alloy with high strength and toughness and a preparation method thereof. In the present disclosure, in-situ nano-ceramic particles and REMs simultaneously introduced into an Al—Zn—Mg alloy can effectively refine the grains and significantly improve the strength and toughness of the alloy; and REM-containing nano-precipitated phases and in-situ nanoparticles distributed in the grains or at grain boundaries can also significantly increase a recrystallization temperature of the alloy, effectively inhibit the dynamic recovery, reduce the re-dissolution of alloying elements, and improve the weldability of the alloy.

Abstract: The present invention provides a method for preparing an in-situ ternary nanoparticle-reinforced aluminum matrix composite (AMC). In this method, an in-situ reaction generation technique is used, and with a powder containing formation elements for producing reinforcing particles as a reactant, in conjunction with a low-frequency rotating magnetic field/ultrasonic field regulation technique, an aluminum-based composite material is prepared using nanoparticle intermediate alloy re-melting. An AA6016-based composite material reinforced by ternary nanoparticles has an average particle size of 65 nm, and has an obvious refinement phenomenon compared with unitary and dual-phase nanoparticles.

Abstract: A graphene and in-situ nano-ZrB2 particle-co-reinforced aluminum matrix composite (AMC) and a preparation method thereof are provided. The preparation method includes: heating an aluminum alloy for melting, adding potassium fluoroborate and potassium fluorozirconate to produce ZrB2 particles in-situ, additionally adding a mixture of pre-prepared copper-coated graphene and an aluminum powder, and stirring with an electromagnetic field for uniform dispersion; and ultrasonically treating the resulting melt to improve the dispersion of the in-situ nano-ZrB2 particles and the graphene, casting for molding to obtain a casting, and subjecting the casting to homogenization and rolling for deformation to obtain the graphene and in-situ nano-ZrB2 particle-co-reinforced AMC. The in-situ generation of the reinforcement nano-ZrB2 particles in an aluminum alloy melt increases the number of interfaces in the composite and also increases the dislocation density.

Abstract: A graphene and in-situ nano-ZrB2 particle-co-reinforced aluminum matrix composite (AMC) and a preparation method thereof are provided. The preparation method includes: heating an aluminum alloy for melting, adding potassium fluoroborate and potassium fluorozirconate to produce ZrB2 particles in-situ, additionally adding a mixture of pre-prepared copper-coated graphene and an aluminum powder, and stirring with an electromagnetic field for uniform dispersion; and ultrasonically treating the resulting melt to improve the dispersion of the in-situ nano-ZrB2 particles and the graphene, casting for molding to obtain a casting, and subjecting the casting to homogenization and rolling for deformation to obtain the graphene and in-situ nano-ZrB2 particle-co-reinforced AMC. The in-situ generation of the reinforcement nano-ZrB2 particles in an aluminum alloy melt increases the number of interfaces in the composite and also increases the dislocation density.

Abstract: The present invention relates to an aluminum matrix composite (AMC), and particularly to a method and apparatus for preparing an AMC with a high strength, a high toughness, and a high neutron absorption. The present invention combines a high-neutron-absorption and highly stable micro-B4C extrinsic reinforcement with an in-situ nano-reinforcement containing elements B, Cd, and Hf and having high neutron capture ability, achieves efficient absorption of neutrons by using the large cross-sectional area of the micro-reinforcement, achieves effective capture of rays penetrating gaps of the micro-reinforcement by means of the highly dispersed in-situ nano-reinforcement, and significantly improves the toughness of the composite material by means of the high-dispersion toughening effect of the nano-reinforcement, obtaining a particle-reinforced aluminum matrix composite (PAMC) having high toughness and high neutron absorption.

Abstract: The present invention relates to an aluminum matrix composite (AMC), and particularly to a method and apparatus for preparing an AMC with a high strength, a high toughness, and a high neutron absorption. The present invention combines a high-neutron-absorption and highly stable micro-B4C extrinsic reinforcement with an in-situ nano-reinforcement containing elements B, Cd, and Hf and having high neutron capture ability, achieves efficient absorption of neutrons by using the large cross-sectional area of the micro-reinforcement, achieves effective capture of rays penetrating gaps of the micro-reinforcement by means of the highly dispersed in-situ nano-reinforcement, and significantly improves the toughness of the composite material by means of the high-dispersion toughening effect of the nano-reinforcement, obtaining a particle-reinforced aluminum matrix composite (PAMC) having high toughness and high neutron absorption.

Abstract: The present invention provides a method for preparing an in-situ ternary nanoparticle-reinforced aluminum matrix composite (AMC). In this method, an in-situ reaction generation technique is used, and with a powder containing formation elements for producing reinforcing particles as a reactant, in conjunction with a low-frequency rotating magnetic field/ultrasonic field regulation technique, an aluminum-based composite material is prepared using nanoparticle intermediate alloy re-melting. An AA6016-based composite material reinforced by ternary nanoparticles has an average particle size of 65 nm, and has an obvious refinement phenomenon compared with unitary and dual-phase nanoparticles.

Abstract: Provided are an anti-fatigue in-situ aluminum-based nanocomposite material for heavy-load automobile hubs and a preparation method therefor. By means of the fine adjustment of components and a forming process, in situ nano-compositing, micro-alloying and rapid compression moulding techniques are combined. That is, after the addition of Zr and B, an in-situ reaction occurs to form a nano ZrB2 ceramic reinforcement, which is distributed in aluminum crystals and crystal boundaries and bonded to a metallurgical interface kept firm with the matrix.

Abstract: Provided are an anti-fatigue in-situ aluminium-based nanocomposite material for heavy-load automobile hubs and a preparation method therefor. By means of the fine adjustment of components and a forming process, in situ nano-compositing, micro-alloying and rapid compression moulding techniques are combined. That is, after the addition of elements Zr and B, an in-situ reaction occurs to form a nano ZrB2 ceramic reinforcement which is distributed in aluminium crystals and crystal boundaries and bonded to a metallurgical interface kept firm with the matrix.