文献类型：期刊文献

英文题名：Failure mode and fatigue mechanism of laser-remelted plasma-sprayed Ni alloy coatings in rolling contact

作者：Zhang, X. C.[1,2];Xu, B. S.[2];Xuan, F. Z.[1];Wang, Z. D.[1];Tu, S. T.[1]

机构：[1]E China Univ Sci & Technol, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China;[2]Natl Key Lab Remfg, Beijing 100072, Peoples R China

年份：2011

卷号：205

期号：10

起止页码：3119

外文期刊名：SURFACE & COATINGS TECHNOLOGY

收录：;EI(收录号：20110213569215);WOS:【SCI-EXPANDED(收录号:WOS:000286866400001)】；

基金：The authors are grateful for the support by the National Natural Science Foundations of China (50835003 and 50805047) and the Shanghai Leading academic discipline project (B503). The author X.C. Zhang is also grateful for the support by the Shanghai Chenguang Planning Project (2008CG36) and the Shanghai Rising-Star Program (08QA14023) and the Ph.D. Programs Foundation of Ministry of Education of China (20090101120021).

语种：英文

外文关键词：Rolling contact fatigue; Coating; Laser remelting; Fatigue mechanism

摘要：The failure mode and rolling contact fatigue failure mechanism of the laser-melted plasma-sprayed coatings were investigated in this paper. The coating was deposited by using a high-efficiency plasma spraying system and remelted by using a CO2 laser in a continuous mode. Thirteen rolling contact tests were performed to obtain the statistical result at an identical condition. Experimental results showed that spalling is the main failure mode of the remelted coating in rolling contact. Prior to the formation of the spall, the surface main crack and ring-type crack have been generated. However, only the main crack might not directly cause the formation of the spall. The joining of the ring-type cracks and subsurface branched cracks was directly responsible for the spall formation. (C) 2010 Published by Elsevier B.V.