首页 | 本学科首页   官方微博 | 高级检索  
     


Application of Acoustic Emission Technology for Quantitative Characterization of Plasma-Sprayed Coatings Subjected to Bending Fatigue Tests
Authors:Jian-nong Jing  Li-hong Dong  Hai-dou Wang  Guo Jin
Affiliation:1.College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin,China;2.National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing,China
Abstract:Plasma-sprayed coatings are widely used in industry, e.g., in applications subject to high wear and corrosion damage, or requiring thermal insulation. However, the failure behavior of such coatings has a great influence on the service safety of mechanical parts. Acoustic emission (AE) has attracted much attention due to its proven usefulness for real-time monitoring of damage evolution and high sensitivity to fracture sources. In this study, the damage evolution behavior of a plasma-sprayed coating subjected to three-point bending fatigue tests was monitored using the AE method. A method combining parameterized, Fourier, and wavelet analysis was used to distinguish the damage modes in the coating. The analysis results revealed two crack modes (surface vertical crack and interface crack) with two different peak frequencies. A finite element method was used to quantify the fracture stress and propagation behavior of cracks, revealing that the thickness of the coating had a strong influence on its spalling.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号