MICROSTRUCTURAL CHANGES DURING CREEP OF A FULLY LAMELLAR TIAL ALLOY

Authors
HERROUIN F HU D BOWEN P JONES IP
Citation
F. Herrouin et al., MICROSTRUCTURAL CHANGES DURING CREEP OF A FULLY LAMELLAR TIAL ALLOY, Acta materialia, 46(14), 1998, pp. 4963-4972
Citations number
26
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Acta materialia → ACNP
ISSN journal
13596454
Volume
46
Issue
14
Year of publication
1998
Pages
4963 - 4972
Database
ISI
SICI code
1359-6454(1998)46:14<4963:MCDCOA>2.0.ZU;2-I
Abstract
A complex gamma-TiAl based alloy, Ti-47Al-1Cr-1Mn-21a-0.2Si (at%), has been creep tested in a Fully lamellar microstructural condition at st resses of 200 and 150 MPa and at temperatures of 700 and 800 degrees C , respectively. This paper describes the effects of such creep test co nditions on alloy microstructure. Crept samples exhibited two types of precipitate along lamellar colony boundaries. Their crystal structure s and chemical compositions have been determined, and formation mechan isms and possible effects on creep are discussed. (C) 1998 Acta Metall urgica Inc. Published by Elsevier Science Ltd. All rights reserved.