MICROSTRUCTURE IN WORN SURFACE OF HADFIELD STEEL CROSSING
In this paper a failed Hadfield (high manganese austenite) steel crossing used in railway system was studied. The microstructure in the worn surfaces of the crossing was investigated using optical microscopy, scanning electron microscopy, transmission electron microscopy and Mossbauer spectroscopy. The results indicated that a nanocrystallization layer formed on the surface of the crossing served. The formation mechanism of the nanocrystalline is the discontinuous dynamic recrystallization. The energy for the recrystallization nucleus formation originates from the interactions between the twins, the dislocations, as well as twin and dislocation. High-density vacancies promoted the recrystallization process including the dislocation climb and the atom diffusion.
Crossing high manganese steel nanocrystallization
F.C.ZHANG B.LV T.S.WANG C.L.ZHENG M.LI M.ZHANG
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Peoples Republic of China
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1185-1190
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）