Transactions of Materials and Heat Treatment

Title：Friction law study and finite element simulation analysis on 7075 aluminum alloy during warm forming process

Authors： Zhu Yunfei1 Xia Jiansheng1 2 Dou Shasha1 Zhu Shaohua1 Qian Haixu1 Zhu Chunyu1 Yang Zirun1

Unit： 1. School of Mechanical Excellence Yancheng Institute of Technology 2. School of Mechanical Engineering Yanshan University Qinhuangdao 066004

KeyWords： 7075 aluminum alloy warm forming friction surface topography variable friction factor

ClassificationCode：TG155.5

year,vol(issue):pagenumber：2024,49(4):194-201

Abstract：

The friction laws of 7075 aluminum alloy under boundary lubrication conditions was studied by the self-designed high temperature friction testing machine, and the variable friction factor model at different temperatures was established. Then, the friction morphology at different temperatures was analyzed, and the accuracy of the variable friction factor model was verified by Abaqus finite element simulation and actual stamping. The research results show that when the test temperature increased from 100 ℃ to 300 ℃ under the boundary lubrication condition, the friction factor increases with the increasing of test temperature. At 100-200 ℃, the friction factor is relatively stable. At 200-300 ℃, the friction factor increases first, then decreases and then becomes stable with the increasing of sliding time. The furrow wear effect on 7075 aluminum alloy surface is obvious at 300 ℃. When the variable friction factor model is used, the simulated forming effect of aluminum alloy is closer to the actual forming effect, and the simulation accuracy of software is improved effectively.

Funds：

国家自然科学基金资助项目（51505408）；江苏省产学研前瞻性联合研究项目（BY2022174）

作者简介：朱云飞（1998-），男，硕士研究生 E-mail：1970770483@qq.com 通信作者：夏建生（1980-），男，博士，教授 E-mail：Xiajiansheng@163.com

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