Hot compression deformation characteristics of Mg-Mn alloys

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 10; pp. 1841 - 1845
• Main Author: 方超 张静 廖爱林 薛绍展 袁付庆 潘复生
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2010; College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China%College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China; National Engineering Research Center for Magnesium Alloys,Chongqing 400044,China
• Subjects: constitutive equation; flow stress; magnesium alloy; thermal deformation; 变形特性; 实验条件; 应变速率; 本构方程; 流动应力; 温度范围; 热压缩; 镁锰合金; constitutive equation; flow stress; magnesium alloy; thermal deformation
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60383-6

The hot deformation behaviors of solution treated Mg-1.8Mn-0.4Er-0.2Al alloys were investigated by means of compression tests on Gleeble-1500 in strain rate range of 0.01-10s^-1,deformation temperature range of 250-450℃ and a true strain of 0.6.The constitutive relationships among flow stress,strain rate and deformation temperature were described by Arrhenius-type equations,based on the fact that the material constants could be calculated under a wide range of strains.The results show that the flow stress of the experimental alloy decreases with temperature increasing and strain rate decreasing.Under the experimental conditions,the products of constant α and n in the constitutive equation are stable within certain strains,and the deformation activation energy ranges from 160 to 220 kJ/mol.It is proved that the values of calculated flow stress are close to the experimental results with average error of 2.01%.