文献类型：期刊文献

英文题名：Rolling contact fatigue behavior of laser cladded WC/Ni composite coating

作者：Xu, Jin-Sha[1];Zhang, Xian-Cheng[1];Xuan, Fu-Zhen[1];Wang, Zheng-Dong[1];Tu, Shan-Tung[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2014

卷号：239

起止页码：7

外文期刊名：SURFACE & COATINGS TECHNOLOGY

收录：;EI(收录号：20140417220835);WOS:【SCI-EXPANDED(收录号:WOS:000331495100002)】；

基金：The authors are grateful for the support by the National Natural Science Foundations of China (51175177) and National High Technology Research and Development Program of China (2012AA040106). The author X.C. Zhang is also grateful for the support by the New Century Excellent Talents in University (NCET-11-0643) and Shanghai Pujiang Program and Key Research Program of Shanghai Science and Technology Committee (12JC1403200).

语种：英文

外文关键词：Rolling contact fatigue; Laser cladding; Composite coating; Fatigue mechanism

摘要：The aim of this paper was to address the fatigue behavior and mechanism of the laser cladded WC/Ni composite coatings under rolling contact condition. The coating was deposited by a 4 kW continuous wave CO2 laser system. Rolling contact fatigue tests were conducted under lubrication condition at room temperature. The surface morphologies of the entire wear track for different rolling cycles were observed and recorded. Experimental results showed that the surface crack behaviors were strongly dependent on the location on the wear track. It was identified that spalling was the main fatigue failure mode of the coating under rolling cycles. The joining of surface cracks and the subsurface branched cracks led to the formation of the spall. The depth of the main subsurface crack was influenced by the distribution of the WC particles in the coating. (C) 2013 Elsevier B.V. All rights reserved.