Ca对Mg-Zn-Y合金组织和力学性能的影响  

Effects of Ca on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy

作　　者：李青林 范佳鹏 刘杨 李龙[1] 张磊[1] Li Qinglin;Fan Jiapeng;Liu Yang;Li Long;Zhang Lei(School of Aeronautical Manufacture Engineering, Nanchang Hangkong University)

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2021年第11期1407-1410,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51401102);南昌航空大学第十五届“三小”课题资助项目。

摘　　要：在准晶增强Mg_(93)Zn_(6)Y_(1)合金中添加Ca,研究了Ca含量对合金凝固组织和力学性能的影响。结果表明,添加Ca能够显著改善合金的凝固组织。随着Ca含量增加,合金中初生α-Mg相的晶粒尺寸逐渐降低,第二相形貌由粗大的骨骼状转变为不连续网状,其体积分数也逐渐减小。另外,随着Ca含量增加,合金的室温力学性能逐渐提高。当添加0.4%的Ca时,合金的抗拉强度和伸长率分别达到221 MPa和4.2%,和未添加Ca的合金相比分别提高了66.2%和90.9%。The effects of Ca on the microstructure and mechanical properties of Mg_(93)Zn_(6)Y_(1) alloy containing icosahedral quasicrystals phase(I-phase) were investigated.The results show that the microstructures of alloys are refined by Ca addition.The grain size of primary α-Mg phase is further decreased with increasing in Ca contents.Moreover,the morphology of second phase is changed from thick skeletal to discontinuous reticular,and the volume fraction of the second phase is further reduced.The mechanical properties of the alloys are further enhanced with the increase of Ca contents.With 0.4%Ca addition,the tensile strength and elongation of the alloy reach 221 MPa and 4.2%,respectively,which are increased by 66.2% and 90.9% compared with those of the Mg_(93)Zn_(6)Y_(1) alloy.

关 键 词：CA Mg_(93)Zn_(6)Y_(1)合金 组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]