期刊
EXPERIMENTAL MECHANICS
卷 52, 期 8, 页码 993-1002出版社
SPRINGER
DOI: 10.1007/s11340-011-9546-4
关键词
Aluminium alloys; Thermo-mechanical processing; Bulk deformation; Constitutive model
资金
- 973 Program [2010CB731702]
- Program for New Century Excellent Talents in University [NCET-10-0838]
- Sheng-hua Yu-ying Program of Central South University
- Freedom Explore Program of Central South University [201011200125]
- Young Core Instructor from Education Commission of Hunan Province, China
In order to predict the high-temperature deformation behavior of Al-Zn-Mg-Cu alloy, the hot compression tests were conducted in the strain rate range of (0.001-0.1)s(-1) and the forming temperature range of (573-723) K. Based on the experimental results, Johnson-Cook model was found inadequate to describe the high-temperature deformation behavior of Al-Zn-Mg-Cu alloy. Therefore, a new phenomenological constitutive model is proposed, considering the coupled effects of strain, strain rate and forming temperature on the material flow behavior of Al-Zn-Mg-Cu alloy. In the proposed model, the material constants are presented as functions of strain rate. The proposed constitutive model correlates well with the experimental results confirming that the proposed model can give an accurate and precise estimate of flow stress for the Al-Zn-Mg-Cu alloy investigated in this study.
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