首页 | 本学科首页   官方微博 | 高级检索  
     检索      

等离子喷涂层接触疲劳失效模式及失效机理的研究
引用本文:王海斗,张志强,李国禄,徐滨士,朴钟宇.等离子喷涂层接触疲劳失效模式及失效机理的研究[J].摩擦学学报,2012,32(3):251-257.
作者姓名:王海斗  张志强  李国禄  徐滨士  朴钟宇
作者单位:1. 装甲兵工程学院装备再制造技术国防科技重点实验室,北京,100072
2. 装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072/河北工业大学材料科学与工程学院,天津300130
3. 河北工业大学材料科学与工程学院,天津,300130
基金项目:The project was supported by Distinguished Young Scholars of NSFC (51125023), 973 Project (2011CB013405), and NSFC (50975285). 国家杰出青年科学基金(51125023)、国家973计划(2011CB013405)和国家自然科学基金面上项目(50975285)资助.
摘    要:研究了等离子喷涂层在不同应力水平下的接触疲劳失效模式与声发射幅值的对应关系,并分析了涂层的接触疲劳失效机理.结果表明:声发射幅值与接触应力的大小无明显的关系,根据疲劳失效时的声发射幅值可以判断涂层接触疲劳失效模式,幅值为87~93 dB时易发生剥落或分层失效,幅值为78~83 dB易发生点蚀失效.涂层表面微凸体与轴承球滚压接触产生黏着磨损以及涂层、磨粒、轴承球三者形成的三体磨料磨损是点蚀失效产生的主要原因.剥落失效主要与涂层表面微观缺陷处裂纹的萌生、扩展以及表面磨损行为有关.层内分层失效是由涂层内部最大剪切应力控制的,而界面分层失效主要是由涂层与基体的低结合强度、热失配以及界面剪切应力造成的.

关 键 词:接触疲劳  等离子喷涂  声发射幅值  失效模式  失效机理

Investigation of Contact Fatigue Failure Mode and Mechanism of Plasma Spraying Coating
WANG Hai-dou,ZHANG Zhi-qiang,LI Guo-lu,XU Bin-shi and PIAO Zhong-yu.Investigation of Contact Fatigue Failure Mode and Mechanism of Plasma Spraying Coating[J].Tribology,2012,32(3):251-257.
Authors:WANG Hai-dou  ZHANG Zhi-qiang  LI Guo-lu  XU Bin-shi and PIAO Zhong-yu
Institution:National Key Lab for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China;1. National Key Lab for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China;2. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;National Key Lab for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China;National Key Lab for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China
Abstract:The relation of contact fatigue failure mode and acoustic emission (AE) amplitude for plasma spraying coating is investigated under different stress levels, and contact fatigue failure mechanism is analysed. The results show that contact fatigue failure mode has no obvious relation with contact stress according to AE amplitude during fatigue failure phase. Spalling or delamination failure tends to happen at the AE amplitude of 87 to 93 dB. Pitting failure tends to happen at the AE amplitude of 78 to 83 dB. Pitting failure is mainly caused by adhesion wear generated in rolling contact between rough salient on coating surface and bearing balls, and by three body abrasion among coating, abrasive particles and bearing balls. Spalling failure is associated with cracks initiation and growth in coating surface microdefects and surface wear behavior. Internal delamination is controlled by maximum shear stress in the coating. Interface delamination is associated with interface shear stress, lower bond strength and thermal mismatch between coating and substrate.
Keywords:contact fatigue  plasma spraying  acoustic emission amplitude  failure mode  failure mechanism
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《摩擦学学报》浏览原始摘要信息
点击此处可从《摩擦学学报》下载免费的PDF全文
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