Transactions of Materials and Heat Treatment

Title：Effects of multi-directional forging and aging treatment on mechanical properties and friction and wear properties for 7075 aluminum alloy at room temperature

Authors： Wang Fan1 Zhao Xiaolian1 2 3

Unit： (1. College of Resources Environment and Materials Guangxi University Nanning 530004 China 2. State Key Laboratory of Life Safety of Characteristic Metal Materials and Composite Structures Nanning 530004 China 3. Key Laboratory of Non-Ferrous Metals and New Materials Processing Technology Ministry of Education Nanning 530004 China)

KeyWords： 7075 aluminum alloy multi-direction forging aging mechanical properties friction and wear

ClassificationCode：TG156.92;TG146.21

year,vol(issue):pagenumber：2024,49(12):1-8

Abstract：

Abstract: The wear resistance of Al-Zn-Mg-Cu alloy is poor, which limites its application in multiple fields. And the current processing technology is difficult to make Al-Zn-Mg-Cu alloy obtain high strength and good plasticity while maintaining good wear resistance. Therefore, for 7075 aluminum alloy, the Al-Zn-Mg-Cu alloy with excellent strength and plasticity matching was prepared by multi-directional forging and aging treatment, its microstructure was characterized, and its mechanical properties and friction and wear properties were tested. The test results show that the strength and hardness of sample increase after multi-directional forging, but the plasticity loss is serious, and the plasticity of alloy is improved to some extent after aging. After multi-directional forging, the sample shows quasi-cleavage fracture. After aging treatment, the number of dimples increases and the cleavage platform decreases. The wear resistance of sample after multi-directional forging and aging treatment increases by 47.4%. The wear mechanism of sample after multi-directional forging and aging treatment is mainly abrasive wear, and the proportion of adhesive wear is reduced.

Funds：

基金项目:广西重点研发计划项目（桂科AB22080015）；广西科技基地和人才专项（桂科AD21238010）；中央引导地方科技发展资金专项（桂科ZY21195030）

作者简介：王帆（1998-），男，硕士研究生 E-mail：2115391064@st.gxu.edu.cn 通信作者：赵小莲(1972-)，女，博士，教授 E-mail：xiaolianzhao@gxu.edu.cn

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