Hot shear deformation constitutive analysis of an extruded Mg-6Li-1Zn alloy

详细信息	查看全文 | 推荐本文 |

• 作者：M. Karami ; R. Mahmudi ; ^{mahmudi@ut.ac.ir}
• 关键词：Deformation ; Constitutive analysis ; Metals ; Alloys
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 August, 2012
• 卷：81
• 期：Complete
• 页码：235-238
• 文件大小：877 K

摘要

The hot shear deformation behavior of an extruded Mg-6Li-1Zn alloy was investigated by shear punch test (SPT) in the temperature range 473-573 K, and in the shear strain rate range 1.2 脳 10^鈭?#xA0;3-6.0 脳 10^鈭?#xA0;2 s^鈭?#xA0;1. Based on the constitutive analysis of the SPT data, it was found that a sine hyperbolic function could properly describe the hot shear deformation behavior of the material. The activation energy of 90-110 kJ mol^鈭?#xA0;1 calculated from sine hyperbolic function together with the power-law stress exponents of 3.8-5.4 is indicative of a pipe鈥恉iffusion鈥恈ontrolled dislocation viscous glide mechanism as an operative deformation mechanism.