Deformation Behavior and Dynamic Recrystallization of As-cast Mg-Y-Nd-Gd-Zr Alloy: A Study with Processing Map

摘要：

The characteristic of dynamic recrystallization (DRX) in Mg-Y-Nd-Gd-Zr magnesium alloy had been investigated by compression test at temperatures between 523 and 723K and the strain rates ranging from 0.002 to 1s-1with maximum strain of 0.693. The flow behavior was described by a power exponent function. Processing map of this alloy was established on the basis of dynamic material model. Microstructure observations suggested that the peak value of dissipation factor was 0.36 at the temperature of 673K and the strain rate of 1s-1. The map exhibits flow instabilities as two domains, one is at the lower temperatures but higher strain rates, and the other is at higher temperatures and lower strains.The region at an intermediate temperature and a high strain rate is the region of the optimal mechanical working properties.

关键词： Mg-Y-Nd-Gd-Zr RE-containing Magnesium Alloy Processing Maps Dynamic Recrystallization Flow Behavior Hot Deformation

作者: Xin ZHAO Kui ZhANG Xinggang LI Yongjun LI Kang ZHANG Shiwei LI

作者单位: State Key Laboratory for Fabrication and Processing of Non-Ferrous Metals General Research Institute Northeast Light Alloy Co., Ltd , Harbin, 150060, China

会议类型: 国际会议

会议名称: 2008年中美材料国际研讨会

会议地点: 重庆

会议语种:英文

页码: 815-821

在线出版日期: 2008-06-09（万方平台首次上网日期，不代表论文的发表时间）