A new methodology for characterizing traction-separation relations for interfacial delamination of thermal barrier coatings

Claudio V. Di Leo; Jacques Luk-Cyr; Haowen Liu; Kaspar Loeffel; Khaled Al-Athel; Lallit Anand

doi:10.1016/j.actamat.2014.02.034

A new methodology for characterizing traction-separation relations for interfacial delamination of thermal barrier coatings

Claudio V. Di Leo
, Jacques Luk-Cyr
, Haowen Liu
, Kaspar Loeffel
, Khaled Al-Athel
, Lallit Anand^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

The ability to characterize the interfacial delamination properties of thermal barrier coatings (TBCs) is of great technological importance for lifetime assessment of such coatings under service conditions. The purpose of this paper is to report on our novel experimental-plus-simulation-based approach to determine the relevant material parameters appearing in a traction-separation-type law which should be useful for modeling delamination failures in TBCs. We combine load-displacement measurements obtained from (i) a standard tension experiment; (ii) a novel shear experiment; and (iii) a novel asymmetric four-point bending mixed-mode experiment, with simulations of these experiments using a representative traction-separation law in a finite-element program, to extract the requisite material parameters for this traction-separation model. The methodology is applied to determine the material parameters for a TBC system (consisting of an air-plasma-sprayed yttria-stabilized-zirconia top-coat and an MCrAlY bond-coat sprayed on a superalloy substrate) which has been isothermally exposed to air at 1100 °C for 144 h prior to testing.

Original language	English
Pages (from-to)	306-318
Number of pages	13
Journal	Acta Materialia
Volume	71
DOIs	https://doi.org/10.1016/j.actamat.2014.02.034
State	Published - Jun 2014

Bibliographical note

Funding Information:
The authors would like to thank the King Fahd University of Petroleum and Minerals in Dhahran, Saudi Arabia, for partially funding the research reported in this paper through the Center for Clean Water and Clean Energy at MIT and KFUPM under Project Number R9-CE-08. Partial support from NSF (CMMI Award No. 1063626) is also gratefully acknowledged. The help of Professor Sanjay Sampath and Dr. Gopal Dwivedi of SUNY Stony Brook in providing us with TBC samples is gratefully acknowledged.

Keywords

Cohesive traction-separation model
Delamination failure
Experimental methods
Finite-element analysis
Thermal barrier coatings

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2014.02.034

Cite this

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title = "A new methodology for characterizing traction-separation relations for interfacial delamination of thermal barrier coatings",

abstract = "The ability to characterize the interfacial delamination properties of thermal barrier coatings (TBCs) is of great technological importance for lifetime assessment of such coatings under service conditions. The purpose of this paper is to report on our novel experimental-plus-simulation-based approach to determine the relevant material parameters appearing in a traction-separation-type law which should be useful for modeling delamination failures in TBCs. We combine load-displacement measurements obtained from (i) a standard tension experiment; (ii) a novel shear experiment; and (iii) a novel asymmetric four-point bending mixed-mode experiment, with simulations of these experiments using a representative traction-separation law in a finite-element program, to extract the requisite material parameters for this traction-separation model. The methodology is applied to determine the material parameters for a TBC system (consisting of an air-plasma-sprayed yttria-stabilized-zirconia top-coat and an MCrAlY bond-coat sprayed on a superalloy substrate) which has been isothermally exposed to air at 1100 °C for 144 h prior to testing.",

keywords = "Cohesive traction-separation model, Delamination failure, Experimental methods, Finite-element analysis, Thermal barrier coatings",

author = "\{Di Leo\}, \{Claudio V.\} and Jacques Luk-Cyr and Haowen Liu and Kaspar Loeffel and Khaled Al-Athel and Lallit Anand",

note = "Funding Information: The authors would like to thank the King Fahd University of Petroleum and Minerals in Dhahran, Saudi Arabia, for partially funding the research reported in this paper through the Center for Clean Water and Clean Energy at MIT and KFUPM under Project Number R9-CE-08. Partial support from NSF (CMMI Award No. 1063626) is also gratefully acknowledged. The help of Professor Sanjay Sampath and Dr. Gopal Dwivedi of SUNY Stony Brook in providing us with TBC samples is gratefully acknowledged.",

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AU - Luk-Cyr, Jacques

AU - Liu, Haowen

AU - Loeffel, Kaspar

AU - Al-Athel, Khaled

AU - Anand, Lallit

N1 - Funding Information: The authors would like to thank the King Fahd University of Petroleum and Minerals in Dhahran, Saudi Arabia, for partially funding the research reported in this paper through the Center for Clean Water and Clean Energy at MIT and KFUPM under Project Number R9-CE-08. Partial support from NSF (CMMI Award No. 1063626) is also gratefully acknowledged. The help of Professor Sanjay Sampath and Dr. Gopal Dwivedi of SUNY Stony Brook in providing us with TBC samples is gratefully acknowledged.

PY - 2014/6

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N2 - The ability to characterize the interfacial delamination properties of thermal barrier coatings (TBCs) is of great technological importance for lifetime assessment of such coatings under service conditions. The purpose of this paper is to report on our novel experimental-plus-simulation-based approach to determine the relevant material parameters appearing in a traction-separation-type law which should be useful for modeling delamination failures in TBCs. We combine load-displacement measurements obtained from (i) a standard tension experiment; (ii) a novel shear experiment; and (iii) a novel asymmetric four-point bending mixed-mode experiment, with simulations of these experiments using a representative traction-separation law in a finite-element program, to extract the requisite material parameters for this traction-separation model. The methodology is applied to determine the material parameters for a TBC system (consisting of an air-plasma-sprayed yttria-stabilized-zirconia top-coat and an MCrAlY bond-coat sprayed on a superalloy substrate) which has been isothermally exposed to air at 1100 °C for 144 h prior to testing.

AB - The ability to characterize the interfacial delamination properties of thermal barrier coatings (TBCs) is of great technological importance for lifetime assessment of such coatings under service conditions. The purpose of this paper is to report on our novel experimental-plus-simulation-based approach to determine the relevant material parameters appearing in a traction-separation-type law which should be useful for modeling delamination failures in TBCs. We combine load-displacement measurements obtained from (i) a standard tension experiment; (ii) a novel shear experiment; and (iii) a novel asymmetric four-point bending mixed-mode experiment, with simulations of these experiments using a representative traction-separation law in a finite-element program, to extract the requisite material parameters for this traction-separation model. The methodology is applied to determine the material parameters for a TBC system (consisting of an air-plasma-sprayed yttria-stabilized-zirconia top-coat and an MCrAlY bond-coat sprayed on a superalloy substrate) which has been isothermally exposed to air at 1100 °C for 144 h prior to testing.

KW - Cohesive traction-separation model

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KW - Finite-element analysis

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JO - Acta Materialia

JF - Acta Materialia

ER -

A new methodology for characterizing traction-separation relations for interfacial delamination of thermal barrier coatings

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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