AZ31-xNd镁合金的微观组织与力学性能  

Effects of Nd Addition on Microstructure and Mechanical Properties of AZ31 Magnesium Alloy

作　　者：李明照[1,2] 李琮[1,2] 王跃琪[1,2] 许并社[1,2] 

机构地区：[1]太原理工大学材料科学与工程学院 [2]太原理工大学教育部新材料界面与工程重点实验室

出　　处：《特种铸造及有色合金》2009年第2期112-114,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金重大研究计划资助项目(90306014);山西省重点实验室开放基金资助项目(2007031014)

摘　　要：研究了Nd对AZ31镁合金微观组织和力学性能的影响。结果表明,Nd的加入使AZ31合金组织中出现了颗粒状和针状的Al2Nd和Mg12Nd化合物,且高熔点的Al2Nd在合金凝固过程中首先析出;随着温度的降低,完全离异共晶化合物Mg12Nd相析出;Nd含量为0.6%时合金的平均晶粒尺寸由68μm降至29μm,合金的铸态抗拉强度、屈服强度和伸长率最高,分别为245MPa、171MPa和9%。Effects of Nd addition on microstructure and mechanical properties of AZ31 magnesium alloy were investigated by SEM(scanning electron microscope)and EDS(energy dispersive spectrum).The results show that particle or acicular Al2Nd and Mg12Nd phase can be observed in AZ31 magnesium alloy with Nd addition.Al2Nd phase is prior to precipitating from the AZ31 magnesium alloy during solidification.With decreasing in temperature,divorced eutectoid Mg12Nd phase is precipitated,which results in the refinement of grain size in microstructure.The average grain size in alloy can be refined from 68μm to 29μm,and desirable tensile strength,yield strength and elongation are 245MPa,171 MPa and 9%,respectively,with 0.6%Nd addition.

关 键 词：AZ31镁合金 钕(Nd) 微观组织 力学性能 

分 类 号：TG113[金属学及工艺—物理冶金]