TY - JOUR
T1 - Residual stress in thermal spray coatings measured by curvature based on 3D digital image correlation technique
AU - Zhu, Jianguo
AU - Xie, Huimin
AU - Hu, Zhenxing
AU - Chen, Pengwan
AU - Zhang, Qingming
PY - 2011/12/15
Y1 - 2011/12/15
N2 - Residual stress is an important factor in thermally sprayed deposits which affects both processing and performance. High stress can influence the structural integrity of sprayed parts and impair their function. Therefore, it is important to know the stress state, understand its origin and be able to control it. In this paper, three-dimensional digital image correlation as a non-destructive full-field optical measurement method is used to measure the strip curvature on thermal spray coatings given a NiCrCoAlY bonding layer and an yttria-stabilized zirconia (YSZ) layer on 304 stainless steel substrate as an example. The stress profile through thickness can be determined in each step of deposition by finite element method based on an inverse analysis and the stress interpretation of curvature. The individual contribution of quenching and thermal stresses to residual stress is analyzed from temperature evolution during post-deposition cooling. In addition, the multilayer progressing deposition and elastic-plastic model are used for the accurate predictions in the simulations.
AB - Residual stress is an important factor in thermally sprayed deposits which affects both processing and performance. High stress can influence the structural integrity of sprayed parts and impair their function. Therefore, it is important to know the stress state, understand its origin and be able to control it. In this paper, three-dimensional digital image correlation as a non-destructive full-field optical measurement method is used to measure the strip curvature on thermal spray coatings given a NiCrCoAlY bonding layer and an yttria-stabilized zirconia (YSZ) layer on 304 stainless steel substrate as an example. The stress profile through thickness can be determined in each step of deposition by finite element method based on an inverse analysis and the stress interpretation of curvature. The individual contribution of quenching and thermal stresses to residual stress is analyzed from temperature evolution during post-deposition cooling. In addition, the multilayer progressing deposition and elastic-plastic model are used for the accurate predictions in the simulations.
KW - Curvature method
KW - Finite element method
KW - Residual stress
KW - Thermal barrier coatings
KW - Three-dimensional digital image correlation
UR - http://www.scopus.com/inward/record.url?scp=80055122218&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2011.08.062
DO - 10.1016/j.surfcoat.2011.08.062
M3 - Article
AN - SCOPUS:80055122218
SN - 0257-8972
VL - 206
SP - 1396
EP - 1402
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
IS - 6
ER -