铸造技术2018，Vol.39Issue(5)：947-951,5.DOI:10.16410/j.issn1000-8365.2018.05.001
Mg-Sc二元合金微观组织和力学性能研究
Microstructures and Mechanical Properties of Mg-Sc Binary Alloy
摘要
Abstract
The Mg-Sc alloy Mg-2％Sc, Mg-5％Sc and Mg-10％Sc binary alloys were prepared by gravity casting and the effect of element Sc on microstructure and mechanical properties of purity magnesium alloy were investigated by optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM) analysis, tensile test and hardness test. The results show that the three components of Mg-Sc alloy Mg-2％Sc, Mg-5％Sc, Mg-10％Sc are monophase solid solution and no second phase is formed. With the increase of Sc content, the grain is refined. The yield strength, tensile strength, elongation and hardness of the alloy increase with the increase of Sc content. Mg-10％Sc has the best mechanical properties and the yield strength, tensile strength, elongation and hardness are 101 MPa, 143.3 MPa, 10.27％, 48.6 HV, respectively. Both fine grain strengthening and solid solution strengthening have contribution to the improvement of the mechanical properties of Mg-Sc alloy. With the increase of Sc content, the effect of solid solution strengthening becomes more and more obvious. With the addition of Sc content, the fracture mode changes from brittle fracture to ductile fracture.关键词
Mg-Sc合金/显微组织/晶粒度/力学性能/固溶强化Key words
Mg-Sc alloy/microstructure/grain/mechanical properties/solid-solution hardening分类
矿业与冶金引用本文复制引用
张曼玉,应韬,曾小勤,李德江,丁文江..Mg-Sc二元合金微观组织和力学性能研究[J].铸造技术,2018,39(5):947-951,5.基金项目
包头市科技发展计划项目(CX2015-32),航天先进技术联合研究中心技术创新项目(USCAST2016-17) （CX2015-32）
