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Creep strength of a binary Al62Ti38 alloy

Sturm, Daniel and Heilmaier, Martin and Saage, Holger and Aguilar, Julio and Schmitz, Georg J. and Drevermann, Anne and Palm, Martin and Stein, Frank and Engberding, Nico and Kelm, Klemens and Irsen, Stephan (2010) Creep strength of a binary Al62Ti38 alloy. International Journal of Materials Research, 101 (5), pp. 676-679. Carl Hanser Verlag. DOI: [10.3139/146.110321]. ISSN 1862-5282.

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Official URL: http://www.ijmr.de/ijmr/o_archiv.asp?o_id=25112811648-50&ausgabe_id=2151183716-242&task=02&nav_id=20091120117326

Abstract

Al-rich Ti–Al alloys, as compared to Ti-rich γ-TiAl-based alloys, offer an additional reduction in density of 20%, better oxidation resistance and sufficient strength at high temperatures. High temperature creep of a binary Al62Ti28 alloy was studied in compression in the temperature range between 1173 K and 1323 K in air. It is shown that the alloy exhibits quite reasonable creep resistance at 1173 K, especially in view of its low density of around 3.8 g cm–3. Stress exponents calculated as the slope n = Δ log (strain rate)/Δ log (stress) = 4 were found to be relatively constant for the temperature and stress regime investigated. This indicates that dislocation climb may be the rate controlling creep mechanism. The values of the activation energies for creep for the as-cast and the annealed Al62Ti38 material coincides well with those found in the literature for interdiffusion of Al in γ-TiAl.

Document Type:Article
Title:Creep strength of a binary Al62Ti38 alloy
Authors:
AuthorsInstitution or Email of Authors
Sturm, DanielOtto-von-Guericke Universität Magdeburg
Heilmaier, MartinOtto-von-Guericke Universität Magdeburg
Saage, HolgerOtto-von-Guericke Universität Magdeburg
Aguilar, JulioACCESS e.V., Aachen
Schmitz, Georg J.ACCESS e.V., Aachen
Drevermann, AnneACCESS e.V., Aachen
Palm, MartinMPI für Eisenforschung, Düsseldorf
Stein, FrankMPI für Eisenforschung, Düsseldorf
Engberding, NicoMPI für Eisenforschung, Düsseldorf
Kelm, KlemensDLR, Institut für Werkstoff-Forschung, Köln
Irsen, StephanForschungszentrum Stiftung caesar, Bonn
Date:1 May 2010
Journal or Publication Title:International Journal of Materials Research
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:101
DOI:[10.3139/146.110321]
Page Range:pp. 676-679
Editors:
EditorsEmail
Rühle, ManfredMax-Planck-Institut für Metallforschung, Stuttgart
Petzow, G.Max-Planck-Institut für Metallforschung, Stuttgart
Fischer, Frank. O. Deutsche Gesellschaft für Materialkunde e.V., Frankfurt
Publisher:Carl Hanser Verlag
ISSN:1862-5282
Status:Published
Keywords:Kriechfestigeit Titanaluminid
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Microanalysis
Deposited By: Klemens Kelm
Deposited On:29 Nov 2010 15:20
Last Modified:20 Mar 2013 19:43

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