制备了不同稀土(RE)元素含量的铝合金铸锭,对其进行均匀化处理后再进行形变热处理,研究了RE含量对其显微组织、力学性能、导电率和耐热性能的影响,最后分析了RE的作用机理及存在形式。结果表明:适量RE的加入能细化铸态合金的晶粒尺寸,但对形变热处理后的组织没有显著影响;RE会降低合金的峰值硬度,提高合金的导电率,当RE的质量分数超过0.1%时会降低合金的拉伸性能;RE能够改善合金的耐热性;RE在合金中主要以β相(AlCuREFeSi)的形式存在。
所属栏目
试验研究
收稿日期
2013/10/12014/9/2
作者单位
袁武华:湖南大学材料科学与工程学院,长沙 410082
张传阳:湖南大学材料科学与工程学院,长沙 410082
备注
袁武华(1973-),男,湖南临湘人,教授,博士。
引用该论文:
YUAN Wu-hua,ZHANG Chuan-yang.Effects of Contents of RE Element on Microstructure and Properties of Aluminum Alloy[J].Materials for mechancial engineering,2014,38(11):54～59
袁武华,张传阳.稀土元素含量对铝合金显微组织和性能的影响[J].机械工程材料,2014,38(11):54～59
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