Effects of isothermal process parameters on the microstructure of Mg-8%Al-1%Si alloy by semisolid isothermal heat treatment
A semisolid microstructure of Mg-8%Al-1%Si alloy was fabricated by isothermal heat treatment process.The effects of isothermal process parameters such as holding temperature and holding time on the microstructure of Mg-8%Al-l%Si alloy were investigated.The results indicated that a non-dendritic microstructure could be obtained by isothermal heat treatment in alloy.With the increasing holding temperature from 560 to 575 ℃ or holding time from 5 to 30min,the liquid volume fraction increased,the average size of α-Mg grains grew larger and globular tendency became more obvious.In addition,the Mg2Si phase transformed from Chinese script shape to granule shape,the morphology modification mechanisium of Mg2Si phase in Mg-8%Al-l%Si alloy during the semisolid isothermal heat treatment was studied.
Semisolid isothermal heat treatment Mg2Si phase morphology
Cao Lijie Ma Guorui Tang Chun-chong
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201600, Chin National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Eng College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001,
国际会议
上海
英文
260-260
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）