Finite element analysis of residual stress in plasma-sprayed ceramic coatings

Valente, Teodoro; Bartuli, Cecilia; Sebastiani, Marco; Casadei, F.

doi:10.1243/1464420042722318

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…Measurement of residual strains in these thermal spray coatings is critical for modeling and designing improved components. The influence of coating powder characteristics, spraying process, and spraying process parameters on the residual stress field of Al 2 O 3 coatings has also been the topic of recent investigations (Ref [10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Residual Strain and Fracture Response of Al2O3 Coatings Deposited via APS and HVOF Techniques

et al. 2011

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The aim of this investigation was to nondestructively evaluate the residual stress profile in two commercially available alumina/substrate coating systems and relate residual stress changes with the fracture response. Neutron diffraction, due to its high penetration depth, was used to measure residual strain in conventional air plasma-sprayed (APS) and finer powder high velocity oxy-fuel (HVOF (h-gun))-sprayed Al 2 O 3 coating/substrate systems. The purpose of this comparison was to ascertain if finer powder Al 2 O 3 coatings deposited via h-gun can provide improved residual stress and fracture response in comparison to conventional APS coatings. To obtain a through thickness residual strain profile with high resolution, a partially submerged beam was used for measurements near the coating surface, and a beam submerged in the coating and substrate materials near the coating-substrate interface. By using the fast vertical scanning method, with careful leveling of the specimen using theodolites, the coating surface and the coating/substrate interface were located with an accuracy of about 50 lm. The results show that the through thickness residual strain in the APS coating was mainly tensile, whereas the HVOF coating had both compressive and tensile residual strains. Further analysis interlinking Vickers indentation fracture behavior using acoustic emission (AE) was conducted. The microstructural differences along with the nature and magnitude of the residual strain fields had a direct effect on the fracture response of the two coatings during the indentation process.

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Section: Introductionmentioning

confidence: 99%

Residual Strain and Fracture Response of Al2O3 Coatings Deposited via APS and HVOF Techniques

et al. 2011

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“…8 In addition to experimental observations, numerical simulations have helped researchers to investigate the stress distribution in different loading conditions as well as damage initiation and propagation in these structures. For example, Valente et al 17 studied the residual stresses in ceramic alumina coating on steel substrate. Stress distribution and damage evolution of TBCs under cyclic thermal loadings have been performed by Bialas, 18 Ranjbar-Far et al 3,6,7 and Nayebpashaee et al 19 in a unit cell using finite element method (FEM).…”

Section: Introductionmentioning

confidence: 99%

“…For example, Valente et al. 17 studied the residual stresses in ceramic alumina coating on steel substrate. Stress distribution and damage evolution of TBCs under cyclic thermal loadings have been performed by Bialas, 18 Ranjbar-Far et al.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the effective parameters of through-the-width crack propagation in ceramic coatings due to substrate tension using discrete element method

Ghasemi

Falahatgar

2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper aims to simulate surface cracking and interfacial delamination in ceramic coatings due to their application in different industries. For this purpose, one of the most widely used ceramics, yttrium-stabilized zirconia, which is used as a thermal insulator for superalloy substrate is considered as a case study. Discrete element method was used, due to its great ability to capture the damages at the microscale, to investigate the effect of crack spacing and coating thickness on crack initiation and propagation. Discrete element method solver code is provided by the authors. To investigate damages, a unit cell of the structure between two successive surface cracks was considered. The length of the unit cell represents the crack density in the structure. In addition, for each unit cell length, three coating thicknesses were considered. The results of the current study were compared and validated with those experiments and numerical simulation results presented in the open literature. Good agreement was found. Finally, the effect of interface roughness on stress distribution and damage initiation was examined.

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Numerical and Experimental Investigation of Residual Stress in Thermal Barrier Coatings During APS Process

Zhu

Xie

2014

J Therm Spray Tech

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Finite element analysis of residual stress in plasma-sprayed ceramic coatings

Cited by 4 publications

References 29 publications

Residual Strain and Fracture Response of Al2O3 Coatings Deposited via APS and HVOF Techniques

Residual Strain and Fracture Response of Al2O3 Coatings Deposited via APS and HVOF Techniques

Investigation on the effective parameters of through-the-width crack propagation in ceramic coatings due to substrate tension using discrete element method

Numerical and Experimental Investigation of Residual Stress in Thermal Barrier Coatings During APS Process

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