State of residual stress in laser-deposited ceramic composite coatings on aluminum alloys

P. B. Kadolkar; T. R. Watkins; J. Th M. De Hosson; B. J. Kooi; N. B. Dahotre

doi:10.1016/j.actamat.2006.07.049

State of residual stress in laser-deposited ceramic composite coatings on aluminum alloys

P. B. Kadolkar, T. R. Watkins, J. Th M. De Hosson, B. J. Kooi, N. B. Dahotre

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

127 Scopus citations

Abstract

The nature and magnitude of the residual stresses within laser-deposited titanium carbide (TiC) coatings on 2024 and 6061 aluminum (Al) alloys were investigated. Macro- and micro-stresses within the coatings were determined using an X-ray diffraction method. Owing to increased debonding between the coating and the substrate, the macro-stresses were found to be compressive and to decrease in magnitude with increasing processing speed. The origin of the macro- and micro-stresses is discussed. To that end, transmission electron microscopy observations showed no evidence of plastic deformation within selected coatings. The micro-stresses in the TiC particulate and aluminum matrix phases within the coatings were found to be independent of the amount of debonding. This study could assist in optimizing the processing parameters to fabricate composite coatings for specific applications.

Original language	English
Pages (from-to)	1203-1214
Number of pages	12
Journal	Acta Materialia
Volume	55
Issue number	4
DOIs	https://doi.org/10.1016/j.actamat.2006.07.049
State	Published - Feb 2007
Externally published	Yes

Keywords

Coatings
Composites
Laser treatment
Residual stresses
X-ray diffraction

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10.1016/j.actamat.2006.07.049

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title = "State of residual stress in laser-deposited ceramic composite coatings on aluminum alloys",

abstract = "The nature and magnitude of the residual stresses within laser-deposited titanium carbide (TiC) coatings on 2024 and 6061 aluminum (Al) alloys were investigated. Macro- and micro-stresses within the coatings were determined using an X-ray diffraction method. Owing to increased debonding between the coating and the substrate, the macro-stresses were found to be compressive and to decrease in magnitude with increasing processing speed. The origin of the macro- and micro-stresses is discussed. To that end, transmission electron microscopy observations showed no evidence of plastic deformation within selected coatings. The micro-stresses in the TiC particulate and aluminum matrix phases within the coatings were found to be independent of the amount of debonding. This study could assist in optimizing the processing parameters to fabricate composite coatings for specific applications.",

keywords = "Coatings, Composites, Laser treatment, Residual stresses, X-ray diffraction",

author = "Kadolkar, {P. B.} and Watkins, {T. R.} and {De Hosson}, {J. Th M.} and Kooi, {B. J.} and Dahotre, {N. B.}",

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AU - Kadolkar, P. B.

AU - Watkins, T. R.

AU - De Hosson, J. Th M.

AU - Kooi, B. J.

AU - Dahotre, N. B.

PY - 2007/2

Y1 - 2007/2

N2 - The nature and magnitude of the residual stresses within laser-deposited titanium carbide (TiC) coatings on 2024 and 6061 aluminum (Al) alloys were investigated. Macro- and micro-stresses within the coatings were determined using an X-ray diffraction method. Owing to increased debonding between the coating and the substrate, the macro-stresses were found to be compressive and to decrease in magnitude with increasing processing speed. The origin of the macro- and micro-stresses is discussed. To that end, transmission electron microscopy observations showed no evidence of plastic deformation within selected coatings. The micro-stresses in the TiC particulate and aluminum matrix phases within the coatings were found to be independent of the amount of debonding. This study could assist in optimizing the processing parameters to fabricate composite coatings for specific applications.

AB - The nature and magnitude of the residual stresses within laser-deposited titanium carbide (TiC) coatings on 2024 and 6061 aluminum (Al) alloys were investigated. Macro- and micro-stresses within the coatings were determined using an X-ray diffraction method. Owing to increased debonding between the coating and the substrate, the macro-stresses were found to be compressive and to decrease in magnitude with increasing processing speed. The origin of the macro- and micro-stresses is discussed. To that end, transmission electron microscopy observations showed no evidence of plastic deformation within selected coatings. The micro-stresses in the TiC particulate and aluminum matrix phases within the coatings were found to be independent of the amount of debonding. This study could assist in optimizing the processing parameters to fabricate composite coatings for specific applications.

KW - Coatings

KW - Composites

KW - Laser treatment

KW - Residual stresses

KW - X-ray diffraction

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DO - 10.1016/j.actamat.2006.07.049

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ER -

State of residual stress in laser-deposited ceramic composite coatings on aluminum alloys

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Keywords

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