Mg-3Al-2Sc合金显微组织与性能研究.pdfVIP

Mg一3A1—2Se合金显微组织与性能研究 沙桂英1，王晓磊1，刘 腾1’。，李朝华1，韩 玉1 (1．沈阳航空航天大学材料科学与工程学院，辽宁沈阳110136； 2．美国韦恩州立大学机械工程系，密歇根州底特律48202) 金屈服强度和抗拉强度较AZ31镁合金的显著提高，拉伸断裂机制主要表现为准解理断裂，并有一定量的沿晶断裂。 关键词：Mg．Al—sc合金；热挤压；再结晶；显微组织；力学性能 中图分类号：TGl46．22；TGl66．4文献标识码：A 文章编号：1007—7235(2012)03—0051—04 Microstructureand of propertystudyMg·-3AI一2Scalloy SHA Yul Xiao—leil，LIU Zhao—hual，HAN Gui—yin91，WANG Ten91”，LI ofMaterialsScienceand (1．Institute 110136，China； Engineering，ShenyangAerospaceUniversity，Shenyang ofMechanical State 48202，USA) 2．Department Engineering，WayneUniversity，Detroit hasbeensmeltedwith the hasbeen flux，and Abstract：Mg一3A1-2Sealloy protecting ingot hot—extruded．TheeffectofadditiveSconmicrostructureand of A1—2Sc propertiesMg一3 alloy extrusionshasbeen resultsshowthatthe havebeenrefinedandnew investigated．The grains Sc havebeenoccurredinthe A1-2ScwhiletherareearthSc add— A13 phases Mg一3 alloy being ed．Partial hasbeenformedintheextruded dynamicre—crystallization Mg一3A1-2Scalloy． The andtensile of A1-2Sc havebeen SOB-- yieldstrength strengthMg-·3 alloy greatlyimproved AZ31 tensilefracturemicro—mechanismis pared magnesiumalloy．The mainlyquasi—cleavage fractureand fracture． inter—granula