Transactions of Materials and Heat Treatment

Title：Influence of multi-directional strong strain and aging treatment on frictional wear properties for Al-Zn-Mg-Cu alloy

Authors： Cao Yanyan Yan Weilin

Unit： Guangxi Key Laboratory of Processing for Nonferrous Metal and Featured Materials School of Resources Environment and Materials Guangxi University

KeyWords： Al-Zn-Mg-Cu alloy multi-directional forging microstructure mechanical properties wear resistance

ClassificationCode：TG319；TG166.3

year,vol(issue):pagenumber：2022,47(6):251-256

Abstract：

In order to explore the influences of multi-directional strong strain and aging treatment on microstructure, mechanical properties and friction and wear properties of AlZnMgCu alloy, Al-Zn-Mg-Cu alloy was processed by multi-directional forging and aging process, its microstructure was characterized, and its mechanical properties and friction and wear properties were tested. The results shows that the strength and hardness of AlZnMgCu alloy are increased by multi-directional forging, but its elongation and wear resistance are substantially decreased. After aging treatment for the forged alloy at 120 ℃ for 1320 min, the strength and hardness of AlZnMgCu alloy are further increased, the elongation is significantly improved, and the wear resistance is enhanced. The tensile strength, hardness and elongation of AlZnMgCu are 644 MPa, 210 HV and 14.9%, respectively. The wear resistance is improved by 68.3% compared with the extruded T6 state due to the high hardness and high work hardening. Furthermore, due to the discontinuous distribution of grain boundary precipitates, the stress concentration at grain boundary is reduced, and the wear resistance of AlZnMgCu alloy is also improved.

Funds：

国家自然科学基金资助项目（51561003）

曹艳艳（1992-），女，硕士研究生 E-mail：13783584696m@sina.cn 通信作者：严伟林（1962-），男，博士，教授 E-mail：yanwlin@gxu.edu.cn

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