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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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.
|Title:||Creep strength of a binary Al62Ti38 alloy|
|Date:||1 May 2010|
|Journal or Publication Title:||International Journal of Materials Research|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 676-679|
|Publisher:||Carl Hanser Verlag|
|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|
|Institutes and Institutions:||Institute of Materials Research > Microanalysis|
|Deposited By:||Klemens Kelm|
|Deposited On:||29 Nov 2010 14:20|
|Last Modified:||20 Mar 2013 18:43|
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