Strain-dependent constitutive analysis of extruded AZ61 Mg alloy under hot compression

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题名:	Strain-dependent constitutive analysis of extruded AZ61 Mg alloy under hot compression
作者:	李雄;Liao, Ching-hao;Wu, Horng-yu;Lee, Shyong;Zhu, Feng-jun;Liu, Hsu-cheng;Wu, Cheng-tao
贡献者:	工學院機械工程學系
关键词:	Analysing. Testing. Standards;Applied sciences;AZ61 Mg alloy;Cold working, work hardening;annealing, quenching, tempering, recovery, and recrystallization;textures;Constitutive analysis;Cross-disciplinary physics: materials science;rheology;Dynamic recrystallization;Elasticity. Plasticity;Exact sciences and technology;Flow stress modeling;Instruments for strain, force and torque;Instruments, apparatus, components and techniques common to several branches of physics and astronomy;Materials science;Mechanical instruments, equipment and techniques;Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology;Metals. Metallurgy;Physics;Stress analysis;Stress multiplier;Treatment of materials and its effects on microstructure and properties
日期:	2013-03-10
上传时间:	2026-04-23 15:28:11 (UTC+8)
出版者:	Elsevier BV;Kidlington: Elsevier B.V
摘要:	摘要： The hot deformation characteristics and constitutive analysis of extruded AZ61 Mg alloy were investigated by hot compression tests conducted in the temperature range of 250–450°C and strain rate range of 1×10−3–1s−1. The effect of strain on the constitutive parameters was taken into account in the constitutive analysis. Constitutive equations as a function of strain were established through a simple extension of the hyperbolic sine constitutive relation. The constitutive parameters, stress exponent n, activation energy Q, and ln A in the constitutive equations were calculated as a function of strain. Correlation between the strain-dependent constitutive parameters and flow behavior was analyzed. The constant stress multiplier (α) analysis result indicated that the calculated flow stresses were in good agreement with experimental ones, except at low strains at the deformation conditions with high strain hardening. On the other hand, the constitutive analysis with strain-dependent α value had better estimations between the calculated and experimental flow stresses throughout the entire temperature and strain rate ranges performed in this work. 出版者： Kidlington: Elsevier B.V 出版日期： 2013-03-10 出處： Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2013-03, Vol.565, p.1-8 版權： 2012 Elsevier B.V. 版權： 2014 INIST-CNRS 識別號： ISSN: 0921-5093 識別號： EISSN: 1873-4936 識別號： DOI: 10.1016/j.msea.2012.12.025
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