Journal
SCRIPTA MATERIALIA
Volume 67, Issue 5, Pages 475-478Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2012.06.006
Keywords
Iron-based shape memory alloys; Superelasticity; Shape memory effect; Precipitation; Martensitic transformation
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Funding
- National Science Foundation - International Materials Institutes Program [DMR 08-44082]
- Office of Specific Programs, Division of Materials Research, Arlington, Virginia
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [844082] Funding Source: National Science Foundation
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This study reports the effect of selected aging treatments on the superelastic response of < 100 >-oriented Fe-28% Ni-17% Co-11.5% Al-2.5% Ta (at.%) single crystals in tension. A smaller precipitate size and lower precipitate fraction of the samples aged at 700 degrees C for 7 h leads to lower transformation temperatures, a wide temperature range for superelasticity and higher transformation stress levels as compared to the samples aged at 600 inverted perpendicular C for 90 h. Both aging conditions results in fully recoverable transformation strain of 3.4% in tension. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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