Al-Ti-C中间合金对Mg-8Li-3Al合金组织和性能的影响  

Effects of Al-Ti-C Master Alloy on Microstructure and Mechanical Properties of Mg-8Li-3Al Alloy

作　　者：李明[1] 郝海[1] 张爱民[1] 宋迎德[1] 张兴国[1] 

机构地区：[1]大连理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2013年第1期81-84,共4页Special Casting & Nonferrous Alloys

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-08-0080);中央高校基本科研业务费专项资金资助项目(DUT11ZD115);辽宁"百千万人才工程"资助项目(2011921065)

摘　　要：通过液固反应制备了含TiC和Al4C3相的Al-Ti-C中间合金,并利用OM、XRD、SEM和EDS等研究了Al-Ti-C中间合金对Mg-8Li-3Al合金显微组织和力学性能的影响。结果表明,Al-Ti-C中间合金的最佳加入量为1.0%;加入量为1.0%时,粗大的α相树枝晶变成颗粒状,并且α相变得更加细小圆整,合金的抗拉强度和伸长率分别达到199.28MPa和14.60%。The A1-Ti-C master alloy containing TiC and A14C3 was prepared by a liquid-solid reaction. The effects of the A1-Ti-C master alloy additions on the microstructure and mechanical properties of Mg8Li-3A1 alloy were investigated by means of OM （optical microscopy）, XRD（X-ray diffraction）, SEM （scanning electron microscopy） and EDS （energy dispersive spectrometer）. The results show that the optimal addition of A1-Ti-C master alloy into Mg-8Li-3A1 alloy is 1.0%. The morphology of large a-phases dendrites is changed into particles, and the sizes of a-phases are reduced with spheroidization. Mean- while, the tensile strength and the elongation of Mg-8Li-3A1 alloy reach 199.28 MPa and 14.60%, respectively.

关 键 词：MG-LI-AL合金 AL-TI-C中间合金 晶粒细化 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]