Deconvolution of fracture properties of TiN films on steels from nanoindentation load-displacement curves

被引：47

作者：

Bhowmick, S

Jayaram, V ^{[1
]}

Biswas, SK

机构：

[1] Indian Inst Sci, Dept Met, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci, Dept Engn Mech, Bangalore 560012, Karnataka, India

来源：

ACTA MATERIALIA | 2005年 / 53卷 / 08期

关键词：

TiN films; nanoindentation; shear fracture; residual stress;

D O I：

10.1016/j.actamat.2005.02.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A columnar TiN film under contact loading fails by shear fracture along inter-columnar boundaries. To deconvolute inter-columnar fracture strength from load-displacement curves, nanoindentation experiments were carried out on columnar similar to 1.4 mu m thick TiN films deposited on steels of various hardness, using a Berkovich indenter. A model, which is developed based on the shear-fracture driven deformation of the coating, is applied to the load-displacement curves to obtain inter-columnar fracture strength. The correlation between the fracture strength, biaxial residual stress and substrate yield stress is outlined. The result suggests that the presence of a high compressive residual stress substantially improves the shear fracture strength of a columnar TiN film. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2459 / 2467

页数：9

共 42 条

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