Study of the evolution of the residual stress state in thermal barrier coatings sprayed on AISI 304 stainless steel

Pedro Yáñez-Contreras, José Dolores Oscar Barceinas-Sánchez, Carlos Agustín Poblano-Salas, José Martín Medina-Flores, Adrián Luis García-García, Iván Domínguez-López

Research output: Contribution to journalArticle

Abstract

© The author; licensee Universidad Nacional de Colombia. Thermal barrier coatings (TBC) were manufactured by thermal spraying of CoNiCrAlY and YSZ powders, which constituted the bond coat (BC) and top coat (TC), respectively. The BC was deposited on stainless steel substrates by a high velocity oxygen fuel (HVOF) systemwhilst the TC was deposited on the BC by an atmospheric plasma spraying (APS) gun. TBCs were heat treated at 1200 °C for 8 and 16 h in order to determine the evolution of the residual stress state as a function of time. The residual stress profiles were obtained by employing the Modified Layer Removal Method (MLRM) and an adaptation of this for bilayer coatings called Modified Layer Removal Method for Duplex Coatings (MLRMDC). It was observed that as the exposure time was increased, the compressive residual stresses increased, which was more noticeable in the BCs. The TBCs without heat treatment revealed tensile residual stresses.
Original languageAmerican English
Pages (from-to)160-166
Number of pages7
JournalDYNA (Colombia)
DOIs
StatePublished - 1 Jun 2016
Externally publishedYes

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Thermal barrier coatings
Residual stresses
Stainless steel
Plasma guns
Thermal spraying
Coatings
Plasma spraying
Compressive stress
Tensile stress
Heat treatment
Powders
Oxygen
Substrates

Cite this

Yáñez-Contreras, Pedro ; Barceinas-Sánchez, José Dolores Oscar ; Poblano-Salas, Carlos Agustín ; Medina-Flores, José Martín ; García-García, Adrián Luis ; Domínguez-López, Iván. / Study of the evolution of the residual stress state in thermal barrier coatings sprayed on AISI 304 stainless steel. In: DYNA (Colombia). 2016 ; pp. 160-166.
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Study of the evolution of the residual stress state in thermal barrier coatings sprayed on AISI 304 stainless steel. / Yáñez-Contreras, Pedro; Barceinas-Sánchez, José Dolores Oscar; Poblano-Salas, Carlos Agustín; Medina-Flores, José Martín; García-García, Adrián Luis; Domínguez-López, Iván.

In: DYNA (Colombia), 01.06.2016, p. 160-166.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Study of the evolution of the residual stress state in thermal barrier coatings sprayed on AISI 304 stainless steel

AU - Yáñez-Contreras, Pedro

AU - Barceinas-Sánchez, José Dolores Oscar

AU - Poblano-Salas, Carlos Agustín

AU - Medina-Flores, José Martín

AU - García-García, Adrián Luis

AU - Domínguez-López, Iván

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AB - © The author; licensee Universidad Nacional de Colombia. Thermal barrier coatings (TBC) were manufactured by thermal spraying of CoNiCrAlY and YSZ powders, which constituted the bond coat (BC) and top coat (TC), respectively. The BC was deposited on stainless steel substrates by a high velocity oxygen fuel (HVOF) systemwhilst the TC was deposited on the BC by an atmospheric plasma spraying (APS) gun. TBCs were heat treated at 1200 °C for 8 and 16 h in order to determine the evolution of the residual stress state as a function of time. The residual stress profiles were obtained by employing the Modified Layer Removal Method (MLRM) and an adaptation of this for bilayer coatings called Modified Layer Removal Method for Duplex Coatings (MLRMDC). It was observed that as the exposure time was increased, the compressive residual stresses increased, which was more noticeable in the BCs. The TBCs without heat treatment revealed tensile residual stresses.

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