期刊
ENGINEERING FRACTURE MECHANICS
卷 128, 期 -, 页码 189-204出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2014.07.015
关键词
Thermal spray coatings; Vickers indentation; Fracture toughness (K-1c); Edge crack model; Finite element analysis
类别
资金
- IDEAS research institute at the Robert Gordon University
This study presents an improved approach to the quality assessment of thermally sprayed coatings. Measurements were carried out on five different coatings. Since it is the overall extent of surface cracking during Vickers indentation that is indicative of the volumetric damage, the surface crack length was measured, including the radial cracks, edge cracks, and other cracks around the indentation. It is concluded that the proposed model provides a way forward for determining the fracture toughness (K-1c) of brittle materials where no radial cracks are developed. An elastic-plastic finite element simulation of the Vickers indentation test was conducted to locate the stress fields. (C) 2014 Elsevier Ltd. All rights reserved.
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