Stress and Strain Analysis and Microstructure of Al/Cu Clad Composite Fabricated by Cold Extrusion

Archives of Metallurgy and Materials

Xue Yahong¹  Li Jianyong¹  Liu Yongkang²  Zhao Shuangjing²  Luo Junting² 

[1] Stamping Technology and Science, Yanshan University, Qinhuangdao 066004, China;Education Ministry Key Laboratory of Advanced Forging &

关键词: Keywords: aluminum/copper clad composite;    cold extrusion;    microstructure;    critical shear strain;    finite element method;   

DOI  :  10.1515/amm-2016-0293

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

A five-zone describing model for extrusion of aluminum/copper clad composite was established. Stress and strain were also analyzed by finite element method. The distribution rules of grain size were researched by critical shear strain theory, and zoning phenomenon of grain size was discovered. The grain size of deformed aluminum material becomes gradually finer from center to the interface. The grain size is much fine and the critical shear strain reaches the maximum value in the interface. The grain size of copper material reduces gradually from center to both the interface and exterior surface, which is caused by the higher value of critical shear strain in the interface and exterior surface. The analysis results were verified by microstructure observation and mechanical properties test, indicating that the distribution of grain size for cold extrusion forming can be interpreted by critical shear strain theory.

【 授权许可】

Unknown