摘要
利用扫描电镜和能谱仪对挤压态Mg-13Gd-4Y-0.4Zr合金在300℃/2～32h的时效析出相进行研究。结果表明,经300℃/2～4h时效后合金中有大量白色块状相析出,它是由大量的合金元素组成;经300℃/8～32h时效后,合金中析出两种相,一种是白色块状相,另一种是在晶内析出的片状相,它含有的溶质元素略高于基体。晶内析出的片状相沿3个方向排列析出,3个方向之间互成120℃夹角,呈现出严格的位向关系。析出物的形态和分布取决于溶质元素的浓度。在溶质元素浓度高的区域先析出含有大量溶质元素白色块状相;随后析出的片状相的疏密程度也取决于溶质元素的浓度。
The precipitated phases of Mg-13Gd-4Y-0.4Zr alloy under the aging condition of 300 ℃ for 2~32 h were investigated by SEM and EDS.The results demonstrated that when the aging time was within 2~4 h at 300 ℃,a lot of white brick shaped precipitates rich in alloy elements were founded in the alloy.While increasing the aging time within 8~32 h there were two phases precipitated in the alloy,one was white brick shaped phase,the other was lamellar phase precipitated within grains.The solute elements in the lamella...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2010年第2期197-201,共5页
Chinese Journal of Rare Metals
基金
国家973计划资助项目(2007CB613705)
关键词
镁合金
时效
显微组织
析出相
magnesium alloy
aging
microstructure
precipitated phase
