A model for the weakening effect of very thin hard coatings

被引：39

作者：

Goltsberg, R. ^{[1
]}

Etsion, I. ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Mech Engn, IL-32000 Haifa, Israel

来源：

WEAR | 2013年 / 308卷 / 1-2期

关键词：

Contact mechanics; Hard coatings; Onset of plasticity; Weakening effect; FINITE-ELEMENT-ANALYSIS; CARBON COATINGS; SUBSTRATE; CONTACT; TRIBOLOGY; STRESSES;

D O I：

10.1016/j.wear.2013.09.019

中图分类号：

TH [机械、仪表工业];

学科分类号：

120111 [工业工程];

摘要：

It was observed in several studies involving coated spherical contact, that very thin hard coatings may have a weakening effect of reducing the resistance to yield inception compared to an uncoated case. A numerical approach is utilized in this paper to study the effect of various mechanical properties of the substrate and the coating on the range of thicknesses where this weakening effect is encountered. A coating thickness associated with a maximum weakening is found and a universal dimensionless solution for the range of the detrimental coating thicknesses as well as for the maximum weakening thickness is presented. Good qualitative agreement is found between the model and a few published experimental results. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：10 / 16

页数：7

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