Study on surface nanocrystallization of TiAl alloys induced by HEBMT

摘要：

　　Utilize the high-energy ball milling techniques (HEBMT) to get a certain thickness of the nanocrystalline layer in gradient structure on TiAl-based alloys surface,while using X-ray diffraction and electron microscopy techniques to analyze the microscopic structure of the surface and study its variation along the depth direction.The results show that through HEBMT,the sample surface can get nanocrystallization and its nano-grain size can be refined to less than l0nm while having a 15μm nanocrystalline layer.Nanoindentation tests show that the surface hardness of the samples after HEBMT can be significantly increased from 340HV to 922HV.

关键词： TiAl based alloy high-energy ball milling surface nanocrystallization microstructure microhardness

作者: Yao Tianhang Zhang Wei Liu Yong Zhang Mingyang Wang Dini

作者单位: State Key Lab of Powder Metallurgy, Central South University, Changsha 410083, P.R.China

会议类型: 国际会议

会议名称: the 2012 International Conference on Frontiers of Mechanical Engineering and Materials Engineering (机械工程与材料工程国际会议())

会议地点: 香港

会议语种:英文

页码: 1250-1254

在线出版日期: 2012-07-27（万方平台首次上网日期，不代表论文的发表时间）