The effects of rolling reduction and temperature on the microstructure and mechanical property of 7050 aluminum alloy are investigated. For the sample with a rolling deformation of 30%, most of dendritic structure remained. When the rolling reduction increased to the 70%, the cast structure disappeared and the microstructure consisted of subgrains and recrystallized grains. Some coarse particles were identified to be Al7Cu2Fe phase and Al2CuMg phase by EDS. The Al7Cu2Fe particles with a chain-like distribution did not dissolve into the matrix, whereas the globular-like Al2CuMg phase was partially dissolved during the heat treatment. The fractions of the recrystallized grains in the samples rolled under reductions of 70% and 90% are 1.25% and 12.4%, respectively. The sample rolled under a rolling reduction of 70% exhibited the highest strength and hardness. The sample rolled at 300 degrees C has a lot of recrystallized grains. At 430 degrees C rolling, both of the improvement of material flow and the occurrence of dynamic recovery reduced the stored deformation energy, inducing the amount of recrystallized grains decreased, so the sample exhibited the highest strength and hardness.
Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714
Wang Dong,Ma Zongyi. Effects of rolling process on microstructure and mechanical property of 7050 aluminum alloy[J]. ACTA METALLURGICA SINICA,2008,44(1):49-54.
APA
Wang Dong,&Ma Zongyi.(2008).Effects of rolling process on microstructure and mechanical property of 7050 aluminum alloy.ACTA METALLURGICA SINICA,44(1),49-54.
MLA
Wang Dong,et al."Effects of rolling process on microstructure and mechanical property of 7050 aluminum alloy".ACTA METALLURGICA SINICA 44.1(2008):49-54.
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