Deformation-induced α2 → γ phase transformation in TiAl alloys

C. L. Chen; W. Lu; Dai Sun; L. L. He; H. Q. Ye

doi:10.1016/j.matchar.2010.06.009

Deformation-induced α₂ → γ phase transformation in TiAl alloys

C. L. Chen, W. Lu, Dai Sun, L. L. He, H. Q. Ye

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

19 Citations (Scopus)

Abstract

Deformation-induced α₂ → γ phase transformation in high Nb containing TiAl alloys was investigated using high-resolution transmission electron microscopy (HREM) and energy dispersive X-ray spectroscopy (EDS). The dislocations appearing at the tip of deformation-induced γ plate (DI-γ) and the stacking sequence change of the α₂ matrix were two key evidences for determining the occurrence of the deformation-induced α₂ → γ phase transformation. Compositional analysis revealed that the product phase of the room-temperature transformation was not standard γ phase; on the contrary, the product phase of the high-temperature transformation was standard γ phase.

Original language	English
Pages (from-to)	1029-1034
Number of pages	6
Journal	Materials Characterization
Volume	61
Issue number	11
DOIs	https://doi.org/10.1016/j.matchar.2010.06.009
Publication status	Published - 2010 Nov

Keywords

EDS
Phase transformations
Titanium aluminides
Transmission electron microscopy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matchar.2010.06.009

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title = "Deformation-induced α2 → γ phase transformation in TiAl alloys",

abstract = "Deformation-induced α2 → γ phase transformation in high Nb containing TiAl alloys was investigated using high-resolution transmission electron microscopy (HREM) and energy dispersive X-ray spectroscopy (EDS). The dislocations appearing at the tip of deformation-induced γ plate (DI-γ) and the stacking sequence change of the α2 matrix were two key evidences for determining the occurrence of the deformation-induced α2 → γ phase transformation. Compositional analysis revealed that the product phase of the room-temperature transformation was not standard γ phase; on the contrary, the product phase of the high-temperature transformation was standard γ phase.",

keywords = "EDS, Phase transformations, Titanium aluminides, Transmission electron microscopy",

author = "Chen, {C. L.} and W. Lu and Dai Sun and He, {L. L.} and Ye, {H. Q.}",

note = "Funding Information: This research was carried out with supports from NSFC grant No. 50271073 and the Major State Basic Research Projections of China grant No. 2006CB600905 , which the authors gratefully acknowledge.",

year = "2010",

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T1 - Deformation-induced α2 → γ phase transformation in TiAl alloys

AU - Chen, C. L.

AU - Lu, W.

AU - Sun, Dai

AU - He, L. L.

AU - Ye, H. Q.

N1 - Funding Information: This research was carried out with supports from NSFC grant No. 50271073 and the Major State Basic Research Projections of China grant No. 2006CB600905 , which the authors gratefully acknowledge.

PY - 2010/11

Y1 - 2010/11

N2 - Deformation-induced α2 → γ phase transformation in high Nb containing TiAl alloys was investigated using high-resolution transmission electron microscopy (HREM) and energy dispersive X-ray spectroscopy (EDS). The dislocations appearing at the tip of deformation-induced γ plate (DI-γ) and the stacking sequence change of the α2 matrix were two key evidences for determining the occurrence of the deformation-induced α2 → γ phase transformation. Compositional analysis revealed that the product phase of the room-temperature transformation was not standard γ phase; on the contrary, the product phase of the high-temperature transformation was standard γ phase.

AB - Deformation-induced α2 → γ phase transformation in high Nb containing TiAl alloys was investigated using high-resolution transmission electron microscopy (HREM) and energy dispersive X-ray spectroscopy (EDS). The dislocations appearing at the tip of deformation-induced γ plate (DI-γ) and the stacking sequence change of the α2 matrix were two key evidences for determining the occurrence of the deformation-induced α2 → γ phase transformation. Compositional analysis revealed that the product phase of the room-temperature transformation was not standard γ phase; on the contrary, the product phase of the high-temperature transformation was standard γ phase.

KW - EDS

KW - Phase transformations

KW - Titanium aluminides

KW - Transmission electron microscopy

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