Transactions of Materials and Heat Treatment

Title：Experimental study on microstructure and mechanical properties of 6016 aluminum alloy sheet

Authors： Wang Jianqiang1 Guo Lili1 Li Yongbing2

Unit： (1.Engineering Research Center of Continuous Extrusion School of Materials Science & Engineering Dalian Jiaotong University Dalian 116028 China 2.Beijing National Innovation Institute of Lightweight Ltd. Beijing 100083 China)

KeyWords： 6016 aluminum alloy automobile B column stamping microstructure mechanical properties

ClassificationCode：TG146.2+1

year,vol(issue):pagenumber：2019,44(2):159-166

Abstract：

Microstructures and mechanical properties of 6016 aluminum alloy sheet and automobile B column parts after cold stamping were investigated by optical microscope (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile test and other analytical methods. The results show that the elongation and strain hardening index n of side wall of automotive B column in 0°, 45° and 90° directions are significantly lower than that of the initial material, which has workhardening during the stamping process, and the plasticity and the strain hardening effect are reduced. The anisotropy increases significantly caused by the large deformation of side wall of automotive B column in the vertical direction. The large deformation zone of automotive B column has a large number of dislocation accumulation and dislocation tangle, and the dislocation density is significantly higher than that of the undeformed zone. After stamping of 6016 aluminum alloy sheet, the size of the second phase particles decreases, the effect of dispersion strengthening is notable, and the mechanical properties are changed.

Funds：

基金项目:国家科技重大专项（2014ZX04002-071）

作者简介：汪建强(1992-), 男, 硕士研究生 Email：18842665304@163.com 通讯作者：郭丽丽(1974-), 女,博士, 副教授 Email：guolili@djtu.edu.cn

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