摘要
研究了固溶处理对挤压态Mg-10Sr-5Y中间合金组织及其力学性能的影响。研究结果表明,固溶处理可以改善Mg-10Sr-5Y合金的组织形貌,改变其力学性能。随着固溶处理温度升高,沿晶界分布的金属间化合物Mg17Sr2和Mg24Y5逐渐溶入基体α-Mg,组织分布更均匀,固溶处理后在晶界上还分布着少量未溶的Mg17Sr2和Mg24Y5共晶化合物。当温度低于480℃,合金的硬度变化不明显,温度超过480℃,合金的硬度急剧下降而后增大,500℃时硬度最小。保温时间对合金硬度影响较小。
Effects of solid solution treatment on microstructure and mechanical properties of Mg-10Sr-5Y master alloys were studied. The results indicate that solid solution treatment can modify the microstructure and improve mechanical properties of Mg-10Sr-5Y alloys. The intermetallic compounds, such as Mg17Sr2 and Mg24Y5 distrubited along the grain boundary,dissolve into matrix ct-Mg gradually. The structure distrubites more uniformly with the solid solution temperature increasing. A little und- isolved Mgl7Sr/ and Mg24Y5 eutectic compounds distrubite on the grain boundary after solid solution treatment. When the tem- perature of solid solution is lower than 480℃, the hardness decreases slightly with increasing solution treatment temperature. When the temperature is more than 480℃ ,the hardness decreases sharply and then increases with temperature increasing,the minimum hardness is obtained at 500℃. The effect of holding time on the hardness of Mg-10Sr-5Y alloys is very little.
出处
《稀土》
EI
CAS
CSCD
北大核心
2013年第6期77-81,共5页
Chinese Rare Earths
基金
重庆市自然科学基金重点资助项目(CSTC
2012jjB50008)
