Effect of cryogenic treatment on mechanical properties and electrical conductivity of 6201 aluminum alloy

doi:10.13251/j.issn.0254-6051.2024.10.005

Abstract

Abstract: Effect of cryogenic treatment on the tensile properties and electrical conductivity of 6201 aluminum alloy was investigated using orthogonal test methods. The results show that the tensile strength of the 6201 aluminum alloy is 399.3 MPa through the cryogenic treatment with cooling rate of 1 ℃/min, cryogenic temperature of -120 ℃, holding time of 12 h and cycles number of 2 times, which is improved by 17.96% relative to the untreated group. Through the cryogenic treatment with cooling rate of 5 ℃/min, cryogenic temperature of -196 ℃, holding time of 12 h and cycles number of 1 time, the electrical conductivity of the 6201 aluminum alloy is 48.38%IACS, improved by 1.75% relative to the untreated group. The cryogenic treatment mainly affects the tensile properties and electrical conductivity of the alloy by influencing the size, number and distribution uniformity of the precipitated phases, and the cryogenic treatment further affects the electrical conductivity by influencing the vacancy changes.

Key words: 6201 aluminum alloy, cryogenic treatment, mechanical properties, electrical conductivity

CLC Number:

Zhang Zhijie, Chen Zhi, Yan Xianguo, Niu Xuemei, Jing Linwang, Yuan Haifang, Wei Zhongke. Effect of cryogenic treatment on mechanical properties and electrical conductivity of 6201 aluminum alloy[J]. Heat Treatment of Metals, 2024, 49(10): 31-37.

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