摘要
通过蠕变试验、组织观察和理论计算,研究了Mg-5Y-3Sm-0.8Ca-0.5Sb合金在200℃、50MPa和200℃、70MPa条件下的蠕变行为。结果表明,Mg-5Y-3Sm-0.8Ca-0.5Sb合金在200℃时具有与商用耐热镁合金WE43相近的蠕变性能;随着蠕变应力的增大,合金的晶粒尺寸变化不大,晶界变得不明显;应力指数计算值显示,此时蠕变受扩散和晶界滑动两种机制控制。
The creeping behavior of Mg-5Y-3Sm-0.8Ca-0.5Sb alloy at 200℃ and 50 MPa or 70 MPa was investigated by creeping tests, microstructure observation and theoretic calculation. The results show that the alloy has similar creeping resistance at 200 ℃ compared with that of commercial heat resistant magnesium alloy WE43. With the increase of creeping stress,the grain size of the alloy has no change,but the grain boundary is unobvious. The calculation result of stress exponent indicates that the creeping behavior is controlled by diffusion and grain boundary sliding.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2014年第4期52-54,共3页
Rare Metals and Cemented Carbides
基金
国家自然科学基金(51171059)
河南省高校科技创新团队支持计划(2012IRTSTHN008)
河南省基础与前沿技术研究计划(092300410184)
