Effect of Solution Treatment on Mechanical Properties and Microstructure of Series 7 Aluminum Alloy with Ultra-high Zn Content
Microns ultra-high Zn content(25％mass fraction)aluminum alloy powders were prepared by aerosol atomization in this experiment.Then the bulk high Zn content aluminum alloy with Fine and well-distributed secondary phases was fabricated by spark plasma sintering(SPS)using these high Zn content aluminum powders.The solution-natural aging treatments were also used to further optimize the composition,size and distribution of secondary phases.The tensile strength reached 540MPa and break elongation reached 5.3％when the solution treatment temperature was 400℃.The multiple process of gas atomization-SPS sintering-solution aging treatment provides a new preparation method to ultra-high Zn content 7xxx series aluminum alloys.
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