Journal
SCRIPTA MATERIALIA
Volume 108, Issue -, Pages 23-26Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.06.013
Keywords
Shape memory alloys (SMAs); Microstructure; Quenching; Precipitation; Mechanical properties
Categories
Funding
- Deutsche Forschungsgemeinschaft [NI1327/7-1]
- U.S. National Science Foundation [DMR 08-44082]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0844082] Funding Source: National Science Foundation
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In recent years, iron-based shape-memory-alloys such as Fe-Mn-Al-Ni came into focus, due to superior pseudoelastic performance and concomitantly low costs of the alloying elements. The formation of the ductile gamma-phase in polycrystalline Fe-Mn-Al-Ni and its impact on the pseudoelastic performance have not been addressed, yet. Based on modification of quenching conditions this study shows that controlled gamma-phase precipitation at grain boundaries can suppress intergranular cracking without affecting pseudoelasticity. In situ incremental strain tests revealed good recoverability up to about 8% strain. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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