Journal
SCRIPTA MATERIALIA
Volume 65, Issue 7, Pages 577-580Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.06.027
Keywords
Shape memory alloys; Martensitic phase transformation; Single crystals; Transformation strain; NiTiHf
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Funding
- KY NASA EPSCoR [N08R02B]
- NASA, Dale Hopkins, API
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The shape memory properties of Ni-rich NiTiHf single crystals along the [1 1 1] orientation were investigated by thermal cycling under constant stress and stress cycling at constant temperature in compression. The single crystals demonstrate stable shape memory behavior under ultrahigh stress levels (1000 MPa) with about 3% transformation strain, a maximum work output of 30 J cm(-3) and nearly perfect pseudoelasticity at high temperatures (180-200 degrees C). (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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