Flow Stress Correction of AZ80 Magnesium Alloy for Deformation Heating at High Strain Rates during Hot Compression

摘要：

Accurate description of the material flow stress behaviour is an essential requirement for FEM simulation of metal forming processes. In the present hot compression tests of AZ80 magnesium alloy were performed on Gleeble 3500 at strain rates between 0.01-50s-l and deformation temperatures between 300450 ℃ to determine the flow stress data of the AZ80 magnesium alloy. It was noticed that with increasing strain rate, deformation heating become more pronounced since there is no time for heat escaping during hot compression tests. Thus, a flow stress correction for deformation heating at high strain rates was carried out for the calculation of the constants of constitutive equation. Validation tests were then performed. Good agreements between the predicted and measured values in extrusion pressure were achieved.

关键词： AZ80 alloy Correction Flow stress Deformation heating FEM simulation

作者: Lou Yan Li Luoxing Luan Na

作者单位: College of Mechantronics and Control Engineering,Shenzhen University,Shenzhen 518060,China College of Materials Science and Engineering,Hunan University,Changsha 410082,China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 1326-1330

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）