李建弘,李全安,谢建昌,张兴渊,李克杰

• 1:河南科技大学材料科学与工程学院

摘要(Abstract)：

研究了Y、Nd复合合金化(Y∶Nd=2∶1,wt%)对Mg-6Al合金显微组织和力学性能的影响。结果表明,添加稀土元素Y和Nd可显著提高合金从室温至175℃区间的屈服强度和抗拉强度。在Mg-6Al合金中加入总含量为0.9wt%~3.6wt%的Y+Nd后,合金的晶粒得到明显细化,且出现Al2Y、Al2Nd高熔点稀土合金相。并探讨了钇钕复合合金化对提高镁铝基合金力学性能的机理:室温下主要是细晶强化机制;高温下则主要是高熔点稀土合金相(Al2Y、Al2Nd)的弥散强化,并由此使热稳定性差的-βMg17Al12相的数量减少。

关键词(KeyWords)： 钇;钕;镁合金;力学性能;显微组织

Abstract:

Keywords:

基金项目(Foundation): 河南省杰出人才计划(084200510018);; 河南省高校创新人才培养基金(豫高教[2002]129);; 洛阳市科技攻关项目(0602018A);; 河南科技大学重大预研项目(2007ZD002)

作者(Author): 李建弘,李全安,谢建昌,张兴渊,李克杰

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