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Al3Ti4B中间合金对Mg-7Al-0.4Zn-0.2Mn合金显微组织和性能的影响
陈晶阳 ; 关绍康 ; 林敦文 ; 王利国 ; 李建国 ; CHEN Jing-yang ; GUAN Shao-kang ; LIN Dun-wen ; WANG Li-guo ; LI Jian-guo
2010-06-10 ; 2010-06-10
关键词Mg-7Al-0.4Zn-0.2Mn合金 Al3Ti4B 晶粒细化 异质形核 Mg-7Al-0.4Zn-0.2Mn alloy Al3Ti4B grain refinement heterogeneous nucleation TG113
其他题名Effects of Al3Ti4B master alloy on microstructure and properties of Mg-7Al-0.4Zn-0.2Mn alloys
中文摘要研究了Al3Ti4B中间合金对 Mg 7Al 0.4Zn 0.2Mn合金的显微组织、力学性能及耐腐蚀性能的影响。结果表明: 当Al3Ti4B加入量小于0.3%(质量分数)时, 合金的平均晶粒尺寸显著减小; 当 Al3Ti4B加入量为0.3%时, 合金组织显著细化, 平均晶粒尺寸由未变质合金的 135μm细化到 30μm, 合金拉伸力学性能和耐腐蚀性能最好; 当加入量超过0.3%时, 晶粒粗化; 具有密排六方结构的高熔点化合物 TiB2 (θm =2 980 ℃)和 AlB2(θm=980℃)均可作为α Mg的异质核心, 大量异质结晶核心的存在是导致α Mg晶粒细化的主要原因。; The effects of Al3Ti4B master alloy on microstructure, mechanical and corrosion resisting properties of Mg-7Al-0.4Zn-0.2Mn alloys were studied. The results show that the average grain size of alloy decreases when the addition of Al3Ti4B is less than 0.3%(mass fraction). The microstructure is refined remarkably when adding 0.3% Al3Ti4B, the average grain size decreases from 135 to 30μm. When the Al3Ti4B addition is more than 0.3%, the grain size increases with the increase of Al3Ti4B. The mechanical properties and corrosion resisting properties of alloys with 0.3%Al3Ti4B are the best. High melting point compounds (TiB_2 and AlB_2) with hexagonal closed-packed(HCP) crystal structure can serve as the nucleating sites of α-Mg during solidification, and heterogeneous nucleation is the main reason of the grain refinement of α-Mg grains.; 河南省高校创新人才工程资助项目(豫2001-6); 河南省科技攻关资助项目(0224360015)
语种中文 ; 中文
内容类型期刊论文
源URL[http://hdl.handle.net/123456789/61634]  
专题清华大学
推荐引用方式
GB/T 7714
陈晶阳,关绍康,林敦文,等. Al3Ti4B中间合金对Mg-7Al-0.4Zn-0.2Mn合金显微组织和性能的影响[J],2010, 2010.
APA 陈晶阳.,关绍康.,林敦文.,王利国.,李建国.,...&LI Jian-guo.(2010).Al3Ti4B中间合金对Mg-7Al-0.4Zn-0.2Mn合金显微组织和性能的影响..
MLA 陈晶阳,et al."Al3Ti4B中间合金对Mg-7Al-0.4Zn-0.2Mn合金显微组织和性能的影响".(2010).
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