Deposition-induced residual stresses in plasma-sprayed coatings

Gan, Zhenghao; Ng, Heong Wah; Devasenapathi, A.

doi:10.1016/j.surfcoat.2004.02.010

Cited by 46 publications

(17 citation statements)

References 11 publications

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“…Before they are activated the elements are visually present (in a topdown model); however, they do not add to the overall stiffness of the matrix. This simulation technique has been employed by Gan et al [18] in the residual stress analysis of deposited plasma-spray coatings on a metal substrate.…”

Section: Element Birth and Deathmentioning

confidence: 99%

A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing

Roberts

Wang

Esterlein

et al. 2009

International Journal of Machine Tools and Manufacture

594

244

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Section: Element Birth and Deathmentioning

confidence: 99%

A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing

Roberts

Wang

Esterlein

et al. 2009

International Journal of Machine Tools and Manufacture

594

244

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“…3 Weibull plots of bending strength values for alumina coatings, where P s is the probability of survival, m is the Weibull modulus, and R is the correlation coefficient be preliminarily speculated to arise mainly from the distribution of microstructural defects including pores and microcracks and residual stress within plasma sprayed ceramic coatings, though requiring more experimental and theoretical analysis. Considerable efforts have been made in recent years to understand and predict the residual stresses that develop during the deposition of thermally sprayed coatings (Ref 18,19). Residual stresses in sprayed coatings arise from two main sources: ''quenching stress'' and ''thermal stress,'' which, respectively, are generated as the rapid quenching of molten droplets upon impact onto the substrate with restricted contraction and when cooling the completed deposit and substrate couple from deposition to ambient temperature.…”

Section: Resultsmentioning

confidence: 99%

Evaluating Bending Strength of Plasma Sprayed Al2O3 Coatings

et al. 2009

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The bending strength of plasma sprayed Al 2 O 3 coatings was evaluated using three-point bending tests. The measured strength data sets were statistically analyzed by employing Weibull distribution. It was found that the bending strength values of coatings show obvious anisotropic behavior. Additionally, the bending strength values measured by loading parallel to the spraying direction are lower than those antiparallel to the spraying direction, and larger variability was realized for the former. This may be related mainly to the distribution of residual stress and microstructural defects within coatings.

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“…During the coating process, stress is generated for deforming of the molten drop particle colliding against the matrix in a high speed or the coating for bearing particle's impact [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Arc Spraying 3Cr13 Molten Drop Impact Stress Numerical Analysis

Li¹,

Wang²,

Zhao³

et al. 2013

TOMSJ

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Abstract:In the thermal spraying process, the process for the molten metal particles to hit against matrix to form coating experiences great change temperature. Since the coating materials has different thermal physical properties with the matrix materials, the residual stress is surely left in the coating. Much bigger residual stress not only restricts coating thickness but also primarily affects coating binding strength. Having analyzed reason for residual stress in the thermal spraying coating and matrix, the theoretical model of arc spraying 3Cr13 molten drop impact stress is built and numerical simulation is done for this theoretical model. The result indicates that: the faster the molten drop speed is, the greater the pressure that matrix produces. When the molten drop's collision speed is 100m/s, it is not obvious for the matrix's pressure stress and when the collision speed is increased to 200m/s, the pressure stress produced in the matrix can maximize 5500Mpa; the faster the molten drop's collision speed is, the higher extent the molten drop's flattening is, which is more beneficial to increase coating's bonding strength. The radius for the molten drop in the radius of 35 m becomes 80~110 m after collision and the flat ratio of the molten drop particle is about 3. The theoretical analysis is consistent with the experiment result.

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Deposition-induced residual stresses in plasma-sprayed coatings

Cited by 46 publications

References 11 publications

A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing

A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing

Evaluating Bending Strength of Plasma Sprayed Al2O3 Coatings

Arc Spraying 3Cr13 Molten Drop Impact Stress Numerical Analysis

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