Curvature testing and finite element analysis for the residual stresses in TiN coatings on high speed steel

被引：0
|
作者：
Gong M. [1 ,2 ]
Qiao S. [1 ]
Lu G. [1 ]
Ji H. [1 ]
Lyashenko B. A. [3 ]
机构：
[1] State Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University
[2] Department of Mechanical and Electronic Engineering, Zhanjiang Normal University
[3] Institute of Problems of Strength, National Academy of Sciences
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2010年 / 46卷 / 06期
关键词：
Curvature method; Finite element method; High speed steel; Residual stress; TiN coatings;
D O I：
10.3901/JME.2010.06.100
中图分类号：
学科分类号：
摘要：
Multi-arc ion plating technique is adopted to deposite five different thickness TiN coatings on W6Mo5Cr4V2high speed steel. A curvature method and a finite element method are used to study the TiN coatings residual stresses. Results show that TiN coatings thickness affects greatly on residual stresses, especially on intrinsic stresses. When the coatings thickness changes from 3μm to 11μm, the total residual stresses of TiN coatings change from -3.12GPa to -2.29 GPa, the intrinsic stresses from -1.17 GPa to -0.37 GPa, the thermal stresses from -1.96 GPa to -1.92GPa. The proportion of thermal stresses in the total residual stresses is about 62%~68%. The TiN residual stresses increase nonlinearly with the increasing coatings thickness, when the ratio of TiN coatings thickness to substrate thickness ξ is 0.017, the total residual stresses reach to the maximum value -3.12GPa, then decrease with the increasing ξ value. These changes are ascribed to the intrinsic stresses, which are greatly affected by the defects in the TiN coatings, such as the micro-holes, supercooled liquid drops and micro-cracks in the interface between the coatings and the substrate, increase with the increasing TiN coatings thickness, which causes the intrinsic stresses in TiN coatings to release effectively. © 2010 Journal of Mechanical Engineering.
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页码：100 / 106
页数：6
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