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
N1 - Publisher Copyright:
© The author; licensee Universidad Nacional de Colombia.
PY - 2016/6
Y1 - 2016/6
N2 - 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.
AB - 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.
KW - Modified layer removal method
KW - Modified layer removal method for duplex coatings
KW - Residual stress
KW - Thermal barrier coating
KW - Thermal spraying
UR - http://www.scopus.com/inward/record.url?scp=84975142447&partnerID=8YFLogxK
U2 - 10.15446/dyna.v83n197.51150
DO - 10.15446/dyna.v83n197.51150
M3 - Artículo
SN - 0012-7353
VL - 83
SP - 160
EP - 166
JO - DYNA (Colombia)
JF - DYNA (Colombia)
IS - 197
ER -