摘要
研究了不同组分含量的混合稀土对Mg-5Al-1Si合金高温蠕变性能的影响,对析出相进行了鉴定。研究结果表明,分别加入富镧及富铈混合稀土以后,合金中Mg2Si相得到细化;力学性能检测结果表明,室温及150℃拉伸性能均明显提高。同时,在微量混合稀土及Mg2Si相的综合作用下,含不同混合稀土的Mg-5Al-1Si合金的抗高温蠕变性能均超过AE42。
The influence of different contents of RE on microstructure of Mg-5Al-1Si alloys was studied. Also, the extracting phases were identified and the extracting process and its influence on the mechanical property of alloy were investigated. The results show that addition of small amount of RE to Mg-5Al-1Si alloys resulted in refinement of microstructure. The morphology of the Mg2Si phase changed form coarse Chinese script shape to the fine polygonal shape. Owing to the improvement of microstructure, the mechanical properties of Mg-5Al-1Si alloys at both ambient and elevated temperatures were increased. The high temperature creep resistant properties of Mg-5Al-1Si-xRE raise with the increase of RE content and higher than that of AE42.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期795-798,共4页
Rare Metal Materials and Engineering
基金
国家高技术研究发展计划("863"计划)重点资助项目(2001AA331030)
