Effect of two-stage creep-aging on mechanical properties and corrosion resistance of 7050 aluminum alloy containing Sc

doi:10.13251/j.issn.0254-6051.2020.01.038

Abstract

Abstract: Effect of two-stage creep-aging on mechanical properties and corrosion resistance of the 7050 Al alloy containing Sc was investigated, and compared with the test results of one-stage creep-aging and stress-free two-stage aging for the same alloy. The results show that two-stage creep-aging can obviously enhance the mechanical properties of the 7050 Al alloy containing scandium (Sc) comparing with one-stage creep-aging. The one-stage creep-aged or two-stage creep-aged alloys appear a better corrosion resistance than the stress-free aged alloy, moreover, the corrosion resistance of the one-stage creep-aged alloy is superior to that of the two-stage creep-aged alloy. Besides, the alloy one-stage or two-stage creep-aged in the state of compressive stress has a slightly higher hardness and a little better corrosion resistance than the alloy one-stage or two-stage creep-aged in the state of tensile stress.

Key words: two-stage creep-aging, 7050 aluminum alloy containing Sc, mechanical properties, corrosion resistance

CLC Number:

TG146.2

Zheng Shanhong, Guo Qiaoneng, Liu Zhiyong, Wang Mingxing. Effect of two-stage creep-aging on mechanical properties and corrosion resistance of 7050 aluminum alloy containing Sc[J]. HTM, 2020, 45(1): 193-198.

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