摘要
在基体合金AM50中分别加入Si和Ca,研究了Si和Ca对AM50-xSi合金的微观组织、力学性能及蠕变性能的影响.结果表明:加入Si后,合金高温蠕变性能随Si量的增加而增加并超过了AS41的水平;在AM50-xSi中加入微量Ca以后,合金中的Mg2Si相得到细化,从汉字状转变成颗粒状,室温及150℃拉伸性能明显提高.
AM50 magnesium alloy was adopted as master alloy, and 1%, 2% and 3% Si additions were added, respectively. The influence of Si on the microstructure, mechanical and creep properties of AM50-xSi alloys was investigated. 0.3% Ca was added to fine Mg2Si. The results show that the addition of small amount of Ca to AM50-xSi alloys results in refinement of microstructure. Morphology of the Mg2Si phases changed from coarse Chinese script shape to the fine polygonal shape. The mechanical properties of alloys at both ambient and elevated temperatures increased. The high temperature creep resistant properties of alloys increased with the increase of Si content.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2004年第6期630-634,共5页
Chinese Journal of Materials Research
基金
国家八六三计划新材料领域2001AA331030资助项目.
关键词
金属材料
AM50
蠕变
显微组织
力学性能
Creep
Magnesium alloys
Mechanical properties
Metallographic microstructure
Morphology
