Grain growth kinetics behavior of SiCp reinforced Mg matrix composite during thermal treatment process

摘要：

　　One kind of bimodal size SiCp/AZ91 composite was fabricated by stir casting and then it was subjected to forging and subsequent extrusion.After that the composite was thermal treated at the temperature of 543K-743K.Results show that the existence of SiCp has significant effect on microstructure stability of Mg matrix.The grain growth kinetics of as-extruded bimodal size SiCp/AZ91 composite are investigated by the kinetic equation Dn-Dn0 =kt.Due to the occurrence of static recrystallization, the average grain size do not increase lineally with increasing temperature and time.By ignoring the recrystallized grains, remarkable lower grain growth activation energy is obtained, which is thought to be the higher atomic mobility at non-equilibrium grain boundaries.

关键词： magnesium matrix composite thermal treatment SiCp grain growth active energy

作者: DENG K.K. LI J.C. NIE K.B.

作者单位: College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China

会议类型: 国际会议

会议名称: The 2nd International Conference on Energy and the Future of Heat Treatment and Surface Engineering(第2届未来热处理及表面工程与能源国际会议暨2014年北京香山材料热处理与表面工程国际论坛)

会议地点: 北京

会议语种:英文

页码: 476-480

在线出版日期: 2014-10-11（万方平台首次上网日期，不代表论文的发表时间）