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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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复合添加Y和Nd对Mg-Li合金显微组织及室温压缩织构的影响
DOI: 10.3724/SP.J.1037.2012.00025, PP. 725-732
Keywords: Y,Nd,Mg-Li合金,室温压缩,织构
Abstract:
采用OM,SEM,XRD,EBSD及电子万能试验机,对比研究了Mg-5Li-3Al-2Zn和Mg-5Li-3Al-2Zn-1.2Y-0.8Nd铸态合金的显微组织、力学性能以及室温单向压缩后的织构演变.研究发现,复合添加Y和Nd2种稀土元素后,合金中絮丝状AlLi相明显减少,晶粒得到显著细化,平均尺寸在30μm左右.2种合金的塑性表现良好,加入少量稀土的合金室温压缩的变形量可达到27%.复合添加的稀土元素大幅度降低了Mg晶格的c/a值,显著弱化了合金的基面织构,激活了锥面滑移系的同时,也使得室温下少见的柱面滑移被激活.
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