Fretting wear and microstructure of plasma carburized TiAl alloy

摘要：

A carburized layer is fabricated in the surface of TiAl alloy using plasma carburization at 975 ℃. Fretting wear test at ambient temperature was carried out to evaluate wear resistance of carburized TiAl. Glow discharge spectrum, X-ray diffraction and scanning electron microscopy equipped with energy dispersive spectrometry were used to characterize the microstructure of carburized TiAl and its property capability. The experimental results show that the carburized layer with about 5 μm in thickness is mainly composed of Ti2AlC and possesses better fretting wear resistances at ambient temperature. Precipitation of carbides in surface layer leads to a higher surface hardness and compressive stress, causing a surface strengthening of TiAl. Strengthening mechanism of carburized TiAl is also considered in this investigation.

关键词： TiAl alloy Plasma carburization Fretting wear Mechanical property

作者: Xiaoping Liu Haijun Zhang Peilin Ge Zhenxia Wang Zhiyong He Yanping Liu

作者单位: Research Institute of Surface Engineering, Taiyuan University of Technology,Taiyuan 030024, China Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 651-657

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）