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

M. W. 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)

M. W. 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
Externally published	Yes
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

Access to Document

10.1115/IMECE2003-43203

Cite this

@article{519fd8c82f0140a4ad7ce304e5dbfe74,

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 = "Chen, {M. W.} 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",

doi = "10.1115/IMECE2003-43203",

language = "English",

volume = "68",

pages = "489--495",

journal = "American Society of Mechanical Engineers, Aerospace Division (Publication) AD",

issn = "0733-4230",

publisher = "American Society of Mechanical Engineers(ASME)",

note = "2003 ASME International Mechanical Engineering Congress ; Conference date: 15-11-2003 Through 21-11-2003",

}

TY - JOUR

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

AU - Chen, M. W.

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

Y1 - 2003

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

UR - http://www.scopus.com/inward/record.url?scp=1842507171&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1842507171&partnerID=8YFLogxK

U2 - 10.1115/IMECE2003-43203

DO - 10.1115/IMECE2003-43203

M3 - Conference article

AN - SCOPUS:1842507171

VL - 68

SP - 489

EP - 495

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

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

SN - 0733-4230

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

Access to Document

Other files and links

Fingerprint

Cite this