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Residual thermal stresses in a Fe3Al/Al2O3 gradient coating system

Wang, Jiangting, Hodgson, Peter, Zhang, Jingde and Yang, Chunhui 2008, Residual thermal stresses in a Fe3Al/Al2O3 gradient coating system, Advanced Materials Research, vol. 32, pp. 71-74, doi: 10.4028/www.scientific.net/AMR.32.71.

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Title Residual thermal stresses in a Fe3Al/Al2O3 gradient coating system
Author(s) Wang, Jiangting
Hodgson, Peter
Zhang, Jingde
Yang, Chunhui
Journal name Advanced Materials Research
Volume number 32
Start page 71
End page 74
Total pages 4
Publisher Trans Tech Publications Ltd
Place of publication Switzerland
Publication date 2008-02
ISSN 1022-6680
Keyword(s) residual thermal stress
finite element modeling
Fe3Al/Al2O3
gradient coatings
Summary To combine the merits of both metals and ceramics into one material, many researchers have been studying the deposition of alumina coating using plasma spray on metal substrates. However, as the coatings are deposited at a high temperature, residual thermal stresses develop due to the mismatch of thermal expansion coefficients of the coating and substrate and these are responsible for the initiation and expansion of cracks, which induce the possible failure of the entire material. In this paper, the residual thermal-structural analysis of a Fe3Al/Al2O3 gradient coating on carbon steel substrate is performed using finite element modelling to simulate the plasma spray. The residual thermal stress fields are obtained and analyzed on the basis of temperature fields in gradient coatings during fabrication. The distribution of residual thermal stresses including radial, axial and shear stresses shows stress concentration at the interface between the coatings and substrate. The mismatch between steel substrate and composite coating is still the dominant factor for the residual stresses
Language eng
DOI 10.4028/www.scientific.net/AMR.32.71
Field of Research 091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2008
Copyright notice ©2008, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017904

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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