Shape memory behavior of [111]-oriented NiTi single crystals after stress-assisted aging

Irfan Kaya; Hirobumi Tobe; Haluk Ersin Karaca; Emre Acar; Yuriy Chumlyakov

doi:10.1007/s40195-016-0386-1

Shape memory behavior of [111]-oriented NiTi single crystals after stress-assisted aging

Irfan Kaya, Hirobumi Tobe, Haluk Ersin Karaca, Emre Acar, Yuriy Chumlyakov

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The shape memory behavior of [111]-oriented Ni₅₁Ti₄₉ (at.%) single crystals was investigated after stressassisted aging at 500 °C for 1.5 h under a compressive stress of -150 MPa. It was found that a single family of Ni₄Ti₃ precipitates with two crystallographically equivalent variants was formed after aging under compressive stress. Stressassisted aging resulted in tensile two-way shape memory effect strain of 1.56% under -5 MPa. Thermal cycling under -600 MPa resulted in a transformation strain of -2.15%, while the subsequent thermal cycling under -5 MPa resulted in a tensile two-way shape memory effect strain of 2.2%.

Original language	English
Pages (from-to)	282-286
Number of pages	5
Journal	Acta Metallurgica Sinica (English Letters)
Volume	29
Issue number	3
DOIs	https://doi.org/10.1007/s40195-016-0386-1
State	Published - Mar 2016

Bibliographical note

Publisher Copyright:
© 2016 The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg.

Funding

This work was supported in part by the NASA Fundamental Aeronautics Program, Supersonics Project and the NASA EPSCOR program (Grant No. NNX11AQ31A), and RFBR Project (Grant No. 10-03-0154-a). .

Funders	Funder number
National Aeronautics and Space Administration	NNX11AQ31A
Russian Foundation for Basic Research	10-03-0154-a

Keywords

Aging treatment
Phase transformations
Precipitation
Shape memory alloy (SMA)
Two-way shape memory effect

ASJC Scopus subject areas

Metals and Alloys
Industrial and Manufacturing Engineering

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10.1007/s40195-016-0386-1

Cite this

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title = "Shape memory behavior of [111]-oriented NiTi single crystals after stress-assisted aging",

abstract = "The shape memory behavior of [111]-oriented Ni51Ti49 (at.\%) single crystals was investigated after stressassisted aging at 500 °C for 1.5 h under a compressive stress of -150 MPa. It was found that a single family of Ni4Ti3 precipitates with two crystallographically equivalent variants was formed after aging under compressive stress. Stressassisted aging resulted in tensile two-way shape memory effect strain of 1.56\% under -5 MPa. Thermal cycling under -600 MPa resulted in a transformation strain of -2.15\%, while the subsequent thermal cycling under -5 MPa resulted in a tensile two-way shape memory effect strain of 2.2\%.",

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author = "Irfan Kaya and Hirobumi Tobe and Karaca, \{Haluk Ersin\} and Emre Acar and Yuriy Chumlyakov",

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AU - Kaya, Irfan

AU - Tobe, Hirobumi

AU - Karaca, Haluk Ersin

AU - Acar, Emre

AU - Chumlyakov, Yuriy

PY - 2016/3

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AB - The shape memory behavior of [111]-oriented Ni51Ti49 (at.%) single crystals was investigated after stressassisted aging at 500 °C for 1.5 h under a compressive stress of -150 MPa. It was found that a single family of Ni4Ti3 precipitates with two crystallographically equivalent variants was formed after aging under compressive stress. Stressassisted aging resulted in tensile two-way shape memory effect strain of 1.56% under -5 MPa. Thermal cycling under -600 MPa resulted in a transformation strain of -2.15%, while the subsequent thermal cycling under -5 MPa resulted in a tensile two-way shape memory effect strain of 2.2%.

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KW - Phase transformations

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Shape memory behavior of [111]-oriented NiTi single crystals after stress-assisted aging

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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