Effect of severe plastic deformation on microstructure and mechanical properties of 2519A aluminum alloy

doi:10.13251/j.issn.0254-6051.2020.05.037

Abstract

Abstract: Microstructures and mechanical properties of 2519A aluminum alloy after different severe plastic deformation processes were investigated by means of hardness test, tensile test, and transmission electron microscopy (TEM). The results show that after 50% cold rolling reduction and artificial aging at 165 ℃, the tensile strength, yield strength and elongation of the 2519A alloy are 522 MPa, 468 MPa, 8.5%, respectively. And adding 165 ℃×2 h pre-aging before cold rolling, the mechanical properties are further improved, and the tensile strength, yield strength and elongation of the alloy are 535 MPa, 497 MPa, 8%, respectively. Pre-aging treatment can increase the density of θ′ precipitates in the 2519A alloy and make them more uniformly distributed, which is helpful to improve the mechanical properties of the alloy.

Key words: 2519A aluminum alloy, severe plastic deformation, pre-aging, θ′ precipitates, mechanical properties

CLC Number:

TG146

Ye Zhifei, Sun Daxiang, Zhou Peng, Kuang Hongcong, Xiao Yongtong. Effect of severe plastic deformation on microstructure and mechanical properties of 2519A aluminum alloy[J]. Heat Treatment of Metals, 2020, 45(5): 187-191.

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