Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Transactions of Materials and Heat Treatment》 2007-02
Add to Favorite Get Latest Update

Microstructure and mechanical properties of Mg-9Gd-4Y-0.6Mn alloy

XIAO Yang,ZHANG Xin-ming,CHEN Jian-mei,JIANG Hao(School of Materials Science and Engineering,Central South University,Changsha 410083,China)  
The microstructure of Mg-9Gd-4Y-0.6Mn alloy was investigated by differential scanning calorimetry,X-ray diffraction,scanning electron microscopy,transmission electron microscopy and its mechanical properties were examined by tensile tests at temperatures from 25 to 400℃.The results show that this alloy has excellent mechanical properties.The superplasticity of the alloy is observed in tensile test at 400℃ and the elongation reachies 266%,and the superplastic deformation mechanism is the coordination between dynamic recrystallization and grain boundary sliding.Mg_3X(X is Gd and Y) phase easily forms in the process of solidification that can not be eliminated by solution treatment.As for the peak hardness of the alloy in the state of cast-T5,cast-T6,rolled-T5 and rolled-T6,the highest is obtained for rolled-T5.The high density of precipitate plates providing the effective barriers to dislocations gliding on the basal plane of magnesium is the cause of strengthening and heat resistance of this alloy.
【Fund】: 国家“863”计划资助项目(2005AA741062 2004AA741062);; 国家科研项目(5133001E)和(51412020304QT7106)
【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