Role of aging time on the microstructure and shape memory properties of NiTiHfPd single crystals

Role of aging time on the microstructure and shape memory properties of NiTiHfPd single crystals

Shape memory properties of [111] oriented NiTiHfPd single crystals aged at 600°C for 48 and 72h were investigated through isobaric thermal cycling and superelasticity experiments in compression. A maximum transformation strain of 2.6% at 1000MPa compressive stress was attained above 100°C. It was ob...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 573; pp. 161 - 165
Main Authors: Acar, E., Karaca, H.E., Basaran, B., Yang, F., Mills, M.J., Noebe, R.D., Chumlyakov, Y.I.
Format: Journal Article
Language:English
Published: Elsevier B.V 20-06-2013
Subjects:
Aging
Elastic energy
NiTiHfPd
Shape memory alloy
Single crystals
Aging
NiTiHfPd
Single crystals
Shape memory alloy
Elastic energy
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Summary:Shape memory properties of [111] oriented NiTiHfPd single crystals aged at 600°C for 48 and 72h were investigated through isobaric thermal cycling and superelasticity experiments in compression. A maximum transformation strain of 2.6% at 1000MPa compressive stress was attained above 100°C. It was observed that precipitate size and interparticle distances were strong functions of aging time and subsequently govern the shape memory responses of the NiTiHfPd single crystals. Moreover, it was revealed that the elastic energy storage highly depends on precipitate characteristics.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2013.02.016