Estimation of residual stress and its effects on the mechanical properties of detonation gun sprayed WC-Co coatings

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	Estimation of residual stress and its effects on the mechanical properties of detonation gun sprayed WC-Co coatings
	T. G. Wang; S. S. Zhao; W. G. Hua; J. B. Li; J. Gong; C. Sun
	2010
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	527 期号:3 页码:454-461
摘要	It is essential to analyze the residual stresses of thick coatings since they seriously affect coatings' performance during their service. It is also important to understand the mechanisms by which the stresses arise, to predict and control the stresses for improving coating properties. Because the Stoney formula is commonly used to relate stress to curvature for thin coatings, a new calculation formula was developed to estimate the residual stresses of thick coatings that represent a comprehensive stress state of the coated specimen. Based on the deduced formula and accurate curvature measurements, the residual stresses of detonation gun (D-Gun) sprayed WC-Co coatings with different thickness were obtained. With increasing the coating thickness, the residual stress changed gradually from the tensile nature to a compressive nature. Meanwhile, the coating was in an approximately stress-free state at the thickness of around 365 mu m. The analysis results emphasized the significance of peening stress in controlling the final stress state of the coated specimen, due to the high spraying velocity and kinetic energy during the D-Gun spraying process. Finally, the effects of residual stress on the mechanical properties of the coating were understood, namely, the compressive stress could significantly improve the coating properties, whereas the tensile stress impaired the coating properties. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
部门归属	[wang, tie-gang; zhao, sheng-sheng; hua, wei-gang; li, jia-bao; gong, jun; sun, chao] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;sun, c (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;csun@imr.ac.cn
关键词	Residual Stress (Ti D-gun Spraying Al)n Films Wc-co Coating Peening Stress Mechanical Property Particle-velocity Elastic-modulus Microstructure Temperature Deposition Thickness Titania Solids Metals
URL	查看原文
WOS记录号	WOS:000273983800006
引用统计	被引频次：53[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31516
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	T. G. Wang,S. S. Zhao,W. G. Hua,et al. Estimation of residual stress and its effects on the mechanical properties of detonation gun sprayed WC-Co coatings[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(3):454-461.
APA	T. G. Wang,S. S. Zhao,W. G. Hua,J. B. Li,J. Gong,&C. Sun.(2010).Estimation of residual stress and its effects on the mechanical properties of detonation gun sprayed WC-Co coatings.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(3),454-461.
MLA	T. G. Wang,et al."Estimation of residual stress and its effects on the mechanical properties of detonation gun sprayed WC-Co coatings".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.3(2010):454-461.