WELDABLE IN-SITU NANO-STRENGTHENED RARE-EARTH METAL CONTAINING ALUMINUM ALLOY WITH HIGH STRENGTH AND TOUGHNESS AND PREPARATION METHOD THEREOF
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United States of America Patent
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Jun 20, 2024
app pub date -
Jun 3, 2021
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Jun 3, 2021
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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.
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