Journal
SCRIPTA MATERIALIA
Volume 125, Issue -, Pages 68-72Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.07.036
Keywords
FeMnAlNi; Fe-based shape memory alloys; Superelasticity; Abnormal grain growth; Microstructure
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Funding
- National Science Foundation - International Materials Institute Program, Office of Specific Programs, Division of Materials Research, Arlington, Virginia [DMR 08-44082]
- Deutsche Forschungsgemeinschaft (DFG) [NI1327/7-1]
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The effect of heat treatments on superelasticity was investigated in a FeMnAlNi polycrystalline alloy using incremental tensile strain tests at room temperature. Large grains of more than several millimeters can be obtained by a cyclic heat treatment process and the average grain size can be controlled by the number of heat treatment cycles. Improved superelastic response is observed in samples with large relative grain sizes, exhibiting increased elongation to fracture, lower critical stress for transformation, and higher reversibility. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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