Superelasticity and Shape Memory Effects in Polycrystalline Ni-Mn-Ga Microwires

M. F. Qian; X. X. Zhang; Cassie Witherspoon; J. F. Sun; Peter Mullner

doi:10.1016/j.jallcom.2011.10.117

Superelasticity and Shape Memory Effects in Polycrystalline Ni-Mn-Ga Microwires

M. F. Qian, X. X. Zhang, Cassie Witherspoon, J. F. Sun, Peter Mullner

Micron School of Materials Science and Engineering

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

39 Scopus citations

Abstract

Non-stoichiometric Ni _49.9 Mn _28.6 Ga _21.5 microwires with a diameter of 30-80 μm and cellular grain size of 1-3 μm were developed by melt-extraction. The superelasticity and shape memory effect of the microwires were investigated on a Dynamic Mechanical Analyzer (DMA Q800). The onset critical stresses for austenite to martensite transformation increase linearly with temperature and can be described by Clausius-Clapeyron relationship. The martensite to austenite transformation occurs upon unloading occurs only at temperatures at least 11 °C higher than the martensite start temperature. The as-extracted microwire was loaded in its martensite state to a strain of 2.7% without breaking and 92% plastic deformation strain recovers upon heating.

Original language	American English
Pages (from-to)	S296-S299
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	577
Issue number	Supplement 1
DOIs	https://doi.org/10.1016/j.jallcom.2011.10.117
State	Published - 15 Nov 2013

Keywords

Ni-Mn-Ga
melt-extraction
shape memory effect
superelasticity

EGS Disciplines

Materials Science and Engineering

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10.1016/j.jallcom.2011.10.117

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title = "Superelasticity and Shape Memory Effects in Polycrystalline Ni-Mn-Ga Microwires",

abstract = " Non-stoichiometric Ni 49.9 Mn 28.6 Ga 21.5 microwires with a diameter of 30-80 μm and cellular grain size of 1-3 μm were developed by melt-extraction. The superelasticity and shape memory effect of the microwires were investigated on a Dynamic Mechanical Analyzer (DMA Q800). The onset critical stresses for austenite to martensite transformation increase linearly with temperature and can be described by Clausius-Clapeyron relationship. The martensite to austenite transformation occurs upon unloading occurs only at temperatures at least 11 °C higher than the martensite start temperature. The as-extracted microwire was loaded in its martensite state to a strain of 2.7% without breaking and 92% plastic deformation strain recovers upon heating.",

keywords = "Ni-Mn-Ga, melt-extraction, shape memory effect, superelasticity",

author = "Qian, {M. F.} and Zhang, {X. X.} and Cassie Witherspoon and Sun, {J. F.} and Peter Mullner",

year = "2013",

month = nov,

day = "15",

doi = "10.1016/j.jallcom.2011.10.117",

language = "American English",

volume = "577",

pages = "S296--S299",

number = "Supplement 1",

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TY - JOUR

T1 - Superelasticity and Shape Memory Effects in Polycrystalline Ni-Mn-Ga Microwires

AU - Qian, M. F.

AU - Zhang, X. X.

AU - Witherspoon, Cassie

AU - Sun, J. F.

AU - Mullner, Peter

PY - 2013/11/15

Y1 - 2013/11/15

N2 - Non-stoichiometric Ni 49.9 Mn 28.6 Ga 21.5 microwires with a diameter of 30-80 μm and cellular grain size of 1-3 μm were developed by melt-extraction. The superelasticity and shape memory effect of the microwires were investigated on a Dynamic Mechanical Analyzer (DMA Q800). The onset critical stresses for austenite to martensite transformation increase linearly with temperature and can be described by Clausius-Clapeyron relationship. The martensite to austenite transformation occurs upon unloading occurs only at temperatures at least 11 °C higher than the martensite start temperature. The as-extracted microwire was loaded in its martensite state to a strain of 2.7% without breaking and 92% plastic deformation strain recovers upon heating.

AB - Non-stoichiometric Ni 49.9 Mn 28.6 Ga 21.5 microwires with a diameter of 30-80 μm and cellular grain size of 1-3 μm were developed by melt-extraction. The superelasticity and shape memory effect of the microwires were investigated on a Dynamic Mechanical Analyzer (DMA Q800). The onset critical stresses for austenite to martensite transformation increase linearly with temperature and can be described by Clausius-Clapeyron relationship. The martensite to austenite transformation occurs upon unloading occurs only at temperatures at least 11 °C higher than the martensite start temperature. The as-extracted microwire was loaded in its martensite state to a strain of 2.7% without breaking and 92% plastic deformation strain recovers upon heating.

KW - Ni-Mn-Ga

KW - melt-extraction

KW - shape memory effect

KW - superelasticity

UR - https://scholarworks.boisestate.edu/mse_facpubs/111

U2 - 10.1016/j.jallcom.2011.10.117

DO - 10.1016/j.jallcom.2011.10.117

M3 - Article

VL - 577

SP - S296-S299

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - Supplement 1

ER -

Superelasticity and Shape Memory Effects in Polycrystalline Ni-Mn-Ga Microwires

Abstract

Keywords

EGS Disciplines

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