Ti-47Al-1.2Ce合金显微组织及富稀土相的形貌.pdf

第38卷 增刊 金属学跋 Vbl．38Suppl． ACTAMETALLURGICASINICA 2002年9月518—521页 Sept．2002 ：l： 孔凡涛 陈子勇 田竞 陈玉勇 贾均 (哈尔滨工业大学材料科学与工程学院金属精密热加工国家重点实验室，哈尔滨150001) 摘 要 稀土相主要以椭球形存在于晶内和以网状存在于晶界；稀土元素的加入，可以减小TiAl相的单胞体积，细化合金晶粒尺寸和层片 间距． 关键词TiAl基合金，稀土，显微组织 中图法分类号TGl46．23-‘ 文献标识码A MICRoSTRUCTUREANDRAREEARrH—RICH oFTi一47Al一1．2CeALLOY KoNG JIAJun Fantao，CHENZiyong。TIANJin9。CHENYuyongl SchoolofMaterialsScienceand ofPrecisionHot of Engineering，NationalKeyLabetory Processing Instituteof 150001 Technology,Harbin Correspondent：cHENYuyongIprofessor,Tel：(0451)641660tFax：(0451)6413945I E．mail：yychen@hope．hit．edu．cn． received2002——03——25 Manuscript ABSTRACTTherareearthelementCewasaddedto Ti_47at．％Al induction binary alloysby skull elementCewasadded 1．2atomic articlestudiedthe melting．The individually percent．This influencesofrareearthmetalfCelonmicrostructureofTiAlbased andthe ofrare alloy morphologies the earth-rich XRD．SEM．EMPAandTEM．Itwasobservedthattheas-caststructuresof phasesby are in consistedoffine ofrareearth-rich distributed ingots equiaxedgrains；most phasesuniformly of ofrare withinthe boundariesinthe net，andsome earth-rich g