An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings

N. H. Faisal; R. Ahmed; A. K. Prathuru; S. Spence; M. Hossain; J. A. Steel

doi:10.1016/j.engfracmech.2014.07.015

An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings

N. H. Faisal^*, R. Ahmed, A. K. Prathuru, S. Spence, M. Hossain, J. A. Steel

^*Corresponding author for this work

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	189-204
Number of pages	16
Journal	Engineering Fracture Mechanics
Volume	128
DOIs	https://doi.org/10.1016/j.engfracmech.2014.07.015
Publication status	Published - Sept 2014

Keywords

Thermal spray coatings
Vickers indentation
Fracture toughness (K-1c)
Edge crack model
Finite element analysis
RESIDUAL STRAIN-MEASUREMENTS
TITANIA CERAMIC COMPOSITE
CEMENTED CARBIDE COATINGS
RELATIVE WEAR-RESISTANCE
CERMET COATINGS
SLIDING WEAR
NEUTRON-DIFFRACTION
ALUMINA
MICROHARDNESS
STRESS

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10.1016/j.engfracmech.2014.07.015

Cite this

@article{eb43c41fded042aca9850dd3da026174,

title = "An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings",

abstract = "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.",

keywords = "Thermal spray coatings, Vickers indentation, Fracture toughness (K-1c), Edge crack model, Finite element analysis, RESIDUAL STRAIN-MEASUREMENTS, TITANIA CERAMIC COMPOSITE, CEMENTED CARBIDE COATINGS, RELATIVE WEAR-RESISTANCE, CERMET COATINGS, SLIDING WEAR, NEUTRON-DIFFRACTION, ALUMINA, MICROHARDNESS, STRESS",

author = "Faisal, {N. H.} and R. Ahmed and Prathuru, {A. K.} and S. Spence and M. Hossain and Steel, {J. A.}",

year = "2014",

month = sep,

doi = "10.1016/j.engfracmech.2014.07.015",

language = "English",

volume = "128",

pages = "189--204",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier",

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T1 - An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings

AU - Faisal, N. H.

AU - Ahmed, R.

AU - Prathuru, A. K.

AU - Spence, S.

AU - Hossain, M.

AU - Steel, J. A.

PY - 2014/9

Y1 - 2014/9

N2 - 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.

AB - 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.

KW - Thermal spray coatings

KW - Vickers indentation

KW - Fracture toughness (K-1c)

KW - Edge crack model

KW - Finite element analysis

KW - RESIDUAL STRAIN-MEASUREMENTS

KW - TITANIA CERAMIC COMPOSITE

KW - CEMENTED CARBIDE COATINGS

KW - RELATIVE WEAR-RESISTANCE

KW - CERMET COATINGS

KW - SLIDING WEAR

KW - NEUTRON-DIFFRACTION

KW - ALUMINA

KW - MICROHARDNESS

KW - STRESS

U2 - 10.1016/j.engfracmech.2014.07.015

DO - 10.1016/j.engfracmech.2014.07.015

M3 - Article

SN - 0013-7944

VL - 128

SP - 189

EP - 204

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings

Abstract

Keywords

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