摘要
本文采用Gleeble-1500B热模拟试验机研究了铸造Mg-2.5Nd-1.0Zn-0.5Zr稀土镁合金在变形温度为200~400℃、应变速率为0.001~0.1 s^(-1),变形程度为30%条件下的高温压缩变形行为,分析了实验合金在高温变形过程中应力与应变速率和变形温度之间的关系。结果表明,Mg-2.5Nd-1.0Zn-0.5Zr镁合金热变形时,变形温度和应变速率是影响合金热变形性能的重要因素。应变速率越低,温度越高时更容易发生再结晶。提高变形温度和变形量、降低应变速率,均使动态再结晶程度增加,晶粒尺寸加大。
High temperature compression deformation behavior of the Mg-2. 5Nd-1. 0Zn-O. 5Zr RE-containing magnesium alloy were investigated in the temperature range of 200-400 ℃, strain rate of O. 001-0.1 s-1 and deformation degree of 30% on Gleeble-1500B thermo- simulation machine, and the relationship between stress and strain rate and deformation temperature were analyzed. The results show that deformation temperature and strain rate are important factors affecting the performance of thermal deformation of the alloy. Recrystallization is easy to occur under lower strain rate and higher deformation temperature. The degree of dynamic recrystallization and the grain size increase with the deformation temperature and the amount of deformation increasing and the strain rate decreasing.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第6期51-54,共4页
Heat Treatment of Metals
基金
国家自然科学基金(51364032)
