Influence of Martensitic Transformation on the Durability of TBC Systems (invited)

Mingwei Chen; M. L. Glynn; D. Pan; K. T. Ramesh; K. J. Hemker; R. T. Ott; T. C. Hufnage

doi:10.1115/IMECE2003-43203

Influence of Martensitic Transformation on the Durability of TBC Systems (invited)

Mingwei Chen, M. L. Glynn, D. Pan, K. T. Ramesh, K. J. Hemker, R. T. Ott, T. C. Hufnage

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Microstructural evolution of bond coat with thermal cycling was characterized with transmission electron microscopy (TEM) and high temperature X-ray diffraction (HT-XRD) analysis. Before thermal cycling, the structure of asfabricated bond coat was confirmed to be a long-range ordered B2 β-phase. After thermal cycling to ∼28 % of the cyclic life, the bond coat was found to transform into a Nirich L1₀ martensite (M) from its original B2 structure. The transformations, M ↔ B2, were demonstrated to be reversible and to occur on heating and cooling in each cycle. Quantitative high temperature XRD measurements verified the phase transformations produce about 0.7% transformation strain. Finite element calculations incorporating the transformation strain indicate that the martensitic transformation significantly influences the development of stresses and strains in TBC systems.

Original language	English
Pages (from-to)	489-495
Number of pages	7
Journal	American Society of Mechanical Engineers, Aerospace Division (Publication) AD
Volume	68
DOIs	https://doi.org/10.1115/IMECE2003-43203
Publication status	Published - 2003 Jan 1
Event	2003 ASME International Mechanical Engineering Congress - Washington, DC., United States Duration: 2003 Nov 15 → 2003 Nov 21

Keywords

Bond coat
Martensitic transformation
Thermal barrier coatings (TBCs)
Transformation strain

ASJC Scopus subject areas

Mechanical Engineering
Space and Planetary Science

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Influence of Martensitic Transformation on the Durability of TBC Systems (invited). / Chen, Mingwei; Glynn, M. L.; Pan, D.; Ramesh, K. T.; Hemker, K. J.; Ott, R. T.; Hufnage, T. C.

In: American Society of Mechanical Engineers, Aerospace Division (Publication) AD, Vol. 68, 01.01.2003, p. 489-495.

Research output: Contribution to journal › Conference article › peer-review

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title = "Influence of Martensitic Transformation on the Durability of TBC Systems (invited)",

abstract = "Microstructural evolution of bond coat with thermal cycling was characterized with transmission electron microscopy (TEM) and high temperature X-ray diffraction (HT-XRD) analysis. Before thermal cycling, the structure of asfabricated bond coat was confirmed to be a long-range ordered B2 β-phase. After thermal cycling to ∼28 % of the cyclic life, the bond coat was found to transform into a Nirich L10 martensite (M) from its original B2 structure. The transformations, M ↔ B2, were demonstrated to be reversible and to occur on heating and cooling in each cycle. Quantitative high temperature XRD measurements verified the phase transformations produce about 0.7% transformation strain. Finite element calculations incorporating the transformation strain indicate that the martensitic transformation significantly influences the development of stresses and strains in TBC systems.",

keywords = "Bond coat, Martensitic transformation, Thermal barrier coatings (TBCs), Transformation strain",

author = "Mingwei Chen and Glynn, {M. L.} and D. Pan and Ramesh, {K. T.} and Hemker, {K. J.} and Ott, {R. T.} and Hufnage, {T. C.}",

year = "2003",

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T1 - Influence of Martensitic Transformation on the Durability of TBC Systems (invited)

AU - Chen, Mingwei

AU - Glynn, M. L.

AU - Pan, D.

AU - Ramesh, K. T.

AU - Hemker, K. J.

AU - Ott, R. T.

AU - Hufnage, T. C.

PY - 2003/1/1

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N2 - Microstructural evolution of bond coat with thermal cycling was characterized with transmission electron microscopy (TEM) and high temperature X-ray diffraction (HT-XRD) analysis. Before thermal cycling, the structure of asfabricated bond coat was confirmed to be a long-range ordered B2 β-phase. After thermal cycling to ∼28 % of the cyclic life, the bond coat was found to transform into a Nirich L10 martensite (M) from its original B2 structure. The transformations, M ↔ B2, were demonstrated to be reversible and to occur on heating and cooling in each cycle. Quantitative high temperature XRD measurements verified the phase transformations produce about 0.7% transformation strain. Finite element calculations incorporating the transformation strain indicate that the martensitic transformation significantly influences the development of stresses and strains in TBC systems.

AB - Microstructural evolution of bond coat with thermal cycling was characterized with transmission electron microscopy (TEM) and high temperature X-ray diffraction (HT-XRD) analysis. Before thermal cycling, the structure of asfabricated bond coat was confirmed to be a long-range ordered B2 β-phase. After thermal cycling to ∼28 % of the cyclic life, the bond coat was found to transform into a Nirich L10 martensite (M) from its original B2 structure. The transformations, M ↔ B2, were demonstrated to be reversible and to occur on heating and cooling in each cycle. Quantitative high temperature XRD measurements verified the phase transformations produce about 0.7% transformation strain. Finite element calculations incorporating the transformation strain indicate that the martensitic transformation significantly influences the development of stresses and strains in TBC systems.

KW - Bond coat

KW - Martensitic transformation

KW - Thermal barrier coatings (TBCs)

KW - Transformation strain

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DO - 10.1115/IMECE2003-43203

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SP - 489

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JO - American Society of Mechanical Engineers, Aerospace Division (Publication) AD

JF - American Society of Mechanical Engineers, Aerospace Division (Publication) AD

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T2 - 2003 ASME International Mechanical Engineering Congress

Y2 - 15 November 2003 through 21 November 2003

ER -

Influence of Martensitic Transformation on the Durability of TBC Systems (invited)

Abstract

Keywords

ASJC Scopus subject areas

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