Thermal exposure induced α₂ + γ → B2 (ω) and α₂ → B2 (ω) phase transformations in a high Nb fully lamellar TiAl alloy

Ze Huang; W Voice; Paul Bowen

doi:10.1016/S1359-6462(02)00350-0

Thermal exposure induced α₂ + γ → B2 (ω) and α₂ → B2 (ω) phase transformations in a high Nb fully lamellar TiAl alloy

Ze Huang, W Voice, Paul Bowen

Metallurgy and Materials

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67 Citations (Scopus)

Abstract

As-HIPped Ti-44Al-8Nb-IB was exposed to 700 degreesC air for up to 3000 h. It has been found that the beta phase removed by hot isostatic pressing (HIPping) reforms as ordered B2 with omega phase during parallel decomposition of alpha(2) lamellae to alpha(2) + gamma lamellae and perpendicular decomposition of single alpha(2) laths into alpha(2) short sections, causing phase transformations of alpha(2) + gamma --> B2(omega) and alpha(2) --> B2(omega). (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	79-84
Number of pages	6
Journal	Scripta Materialia
Volume	48
Issue number	1
DOIs	https://doi.org/10.1016/S1359-6462(02)00350-0
Publication status	Published - 1 Jan 2003

Keywords

transmission electron microscopy
phase transformations
TiAl alloy
stability

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10.1016/S1359-6462(02)00350-0

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title = "Thermal exposure induced α₂ + γ → B2 (ω) and α₂ → B2 (ω) phase transformations in a high Nb fully lamellar TiAl alloy",

abstract = "As-HIPped Ti-44Al-8Nb-IB was exposed to 700 degreesC air for up to 3000 h. It has been found that the beta phase removed by hot isostatic pressing (HIPping) reforms as ordered B2 with omega phase during parallel decomposition of alpha(2) lamellae to alpha(2) + gamma lamellae and perpendicular decomposition of single alpha(2) laths into alpha(2) short sections, causing phase transformations of alpha(2) + gamma --> B2(omega) and alpha(2) --> B2(omega). (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.",

keywords = "transmission electron microscopy, phase transformations, TiAl alloy, stability",

author = "Ze Huang and W Voice and Paul Bowen",

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T1 - Thermal exposure induced α₂ + γ → B2 (ω) and α₂ → B2 (ω) phase transformations in a high Nb fully lamellar TiAl alloy

AU - Huang, Ze

AU - Voice, W

AU - Bowen, Paul

PY - 2003/1/1

Y1 - 2003/1/1

N2 - As-HIPped Ti-44Al-8Nb-IB was exposed to 700 degreesC air for up to 3000 h. It has been found that the beta phase removed by hot isostatic pressing (HIPping) reforms as ordered B2 with omega phase during parallel decomposition of alpha(2) lamellae to alpha(2) + gamma lamellae and perpendicular decomposition of single alpha(2) laths into alpha(2) short sections, causing phase transformations of alpha(2) + gamma --> B2(omega) and alpha(2) --> B2(omega). (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

AB - As-HIPped Ti-44Al-8Nb-IB was exposed to 700 degreesC air for up to 3000 h. It has been found that the beta phase removed by hot isostatic pressing (HIPping) reforms as ordered B2 with omega phase during parallel decomposition of alpha(2) lamellae to alpha(2) + gamma lamellae and perpendicular decomposition of single alpha(2) laths into alpha(2) short sections, causing phase transformations of alpha(2) + gamma --> B2(omega) and alpha(2) --> B2(omega). (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

KW - transmission electron microscopy

KW - phase transformations

KW - TiAl alloy

KW - stability

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DO - 10.1016/S1359-6462(02)00350-0

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SN - 1872-8456

VL - 48

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EP - 84

JO - Scripta Materialia

JF - Scripta Materialia

IS - 1

ER -

Thermal exposure induced α₂ + γ → B2 (ω) and α₂ → B2 (ω) phase transformations in a high Nb fully lamellar TiAl alloy

Abstract

Keywords

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