Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of the Chinese Rare Earth Society》 2006-06
Add to Favorite Get Latest Update

Effect of Erbium and Neodymium on Microstructure and Mechanical Properties of ZK60 Magnesium Alloy

Wang Zhongjun~1,Zhang Caibei~(1*),Cui Jianzhong~2,Le Qichi~2,Shao Xiaohong~1,Sun Yue~2 (1.College of Science,Northeastern University,Shenyang 110004,China;2.The Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110004,China)  
Effect of Er and Nd on the microstructure and mechanical properties of ZK60 magnesium alloy was studied.The results show that the refined and modified microstructure of ZK60 magnesium alloy is made by the addition of Er or Nd.The optimal refined effect is obtained by the addition of 1.0%(mass fraction) Er or Nd,and the grain size is reduced from 33.0 to 23.6 and 25.2 μm,respectively.The rare earth(RE) eutectic phase(ternary Mg-Zn-Er or Mg-Zn-Nd phase) is formed by the addition of Er or Nd.The melting points of the two kinds of RE eutectic phase are both at 518 ℃.The RE eutectic phases both have good stability at elevated temperature,which can pin grains and markedly improve the tensile strength of the alloy at elevated temperature.The morphologies and distribution of RE eutectic phases have marked effect on the tensile properties of the alloy at room temperature.The Mg-Zn-Er phase is irregularly and discontinuously formed along grain boundaries,which can improve the tensile strength and elongation of the alloy.The Mg-Zn-Nd eutectic phase is bulky and net-liked,continuously distributed along grain boundaries,which weakens the effect of solid solution strengthening of Zn in matrix,can decrease the tensile strength and deteriorate plasticity of the alloy.
【Fund】: 国家自然科学基金(50374025);; 国家“863”计划(2003AA331110)资助项目
【CateGory Index】: TG113
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved