摘要
通过高温拉伸试验,研究了GWZ1031K镁合金在250~400℃、变形速率为0.2 mm/min条件下的高温变形行为。使用扫描电镜(SEM)、X射线能谱分析(EDS)等方法对微观组织和拉伸断口进行观察。结果表明,在不同温度下,GWZ1031K镁合金的高温拉伸应力-应变曲线均出现峰值,峰值应力随变形温度的升高而减小,而塑性则随着变形温度的升高呈现非线性快速升高,特别是在400℃时合金出现超塑性现象。结合高温力学性能测试对应的微观组织和断口形貌分析可以得出,GWZ1031K镁合金在250~350℃的温度区间内,具有较好耐热性能(高温抗拉强度)。
High temperature deformation behavior of GWZ1031 K magnesium alloy was investigated by high temperature tensile test at 250-400℃ and the deformation rate of 0.2 mm/min.Scanning electron microscope(SEM)and X-ray energy spectroscopy(EDS)were used to observe the microstructure and tensile fracture.The results show that the peak value appears in all the high temperature tensile stressstrain curves at different temperatures,and the peak stress decreases with the increase of deformation temperature,meanwhile the plasticity increases sharply,particularly superplasticity occurs at 400℃.Combining the analyse of microstructure and fracture morphology,it can be concluded that the GWZ1031 K magnesium alloy has good heat resistance in the temperature range from 250℃ to 350℃.
作者
黄元春
雒晓宇
刘宇
王旭
王舟
Huang Yuanchun;Luo Xiaoyu;Liu Yu;Wang Xu;Wang Zhou(Light Alloy Research Institute,Central South University,Changsha Hunan 410083,China;School of Materials Science and Technology,Central South University,Changsha Hunan 410083,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2021年第1期1-6,共6页
Heat Treatment of Metals
基金
国家自然科学基金(U1837207)。
