A Phenomenological Constitutive Model for Describing Thermo-Viscoplastic Behavior of Al-Zn-Mg-Cu Alloy Under Hot Working Condition

被引：79
作者：
Lin, Y. C. [1 ,2 ]
Li, L. -T. [1 ,2 ]
Jiang, Y. -Q. [1 ,2 ]
机构：
[1] State Key Lab High Performance, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China
来源：
EXPERIMENTAL MECHANICS | 2012年 / 52卷 / 08期
关键词：
Aluminium alloys; Thermo-mechanical processing; Bulk deformation; Constitutive model; DEFORMATION-BEHAVIOR; STEEL; STRESS; FLOW; MICROSTRUCTURE; EVOLUTION;
D O I：
10.1007/s11340-011-9546-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：993 / 1002
页数：10
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