Orientation dependent compression behavior of Co35Ni35Al30 single crystals

Peizhen Li; Haluk E. Karaca; Yury I. Chumlyakov

doi:10.1016/j.jallcom.2017.04.307

Orientation dependent compression behavior of Co₃₅Ni₃₅Al₃₀ single crystals

Peizhen Li, Haluk E. Karaca, Yury I. Chumlyakov

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

21 Scopus citations

Abstract

The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co₃₅Ni₃₅Al₃₀ single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98% in [110], 3% in [100] and 0.30% in [111] orientations, respectively. The Co₃₅Ni₃₅Al₃₀ demonstrated a very high superelastic temperature window of more than 350 °C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal hysteresis of about 6 °C was observed along the [110] orientation. The large decrease of recoverable strain and hysteresis with stress (or temperature) was mainly attributed to the difference of elastic moduli of transforming phases.

Original language	English
Pages (from-to)	326-334
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	718
DOIs	https://doi.org/10.1016/j.jallcom.2017.04.307
State	Published - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

CoNiAl
Shape memory alloys
Single crystal
Superelasticity
Two-way shape memory effect

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2017.04.307

Cite this

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title = "Orientation dependent compression behavior of Co35Ni35Al30 single crystals",

abstract = "The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co35Ni35Al30 single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98% in [110], 3% in [100] and 0.30% in [111] orientations, respectively. The Co35Ni35Al30 demonstrated a very high superelastic temperature window of more than 350 °C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal hysteresis of about 6 °C was observed along the [110] orientation. The large decrease of recoverable strain and hysteresis with stress (or temperature) was mainly attributed to the difference of elastic moduli of transforming phases.",

keywords = "CoNiAl, Shape memory alloys, Single crystal, Superelasticity, Two-way shape memory effect",

author = "Peizhen Li and Karaca, {Haluk E.} and Chumlyakov, {Yury I.}",

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year = "2017",

doi = "10.1016/j.jallcom.2017.04.307",

language = "English",

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T1 - Orientation dependent compression behavior of Co35Ni35Al30 single crystals

AU - Li, Peizhen

AU - Karaca, Haluk E.

AU - Chumlyakov, Yury I.

PY - 2017

Y1 - 2017

N2 - The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co35Ni35Al30 single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98% in [110], 3% in [100] and 0.30% in [111] orientations, respectively. The Co35Ni35Al30 demonstrated a very high superelastic temperature window of more than 350 °C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal hysteresis of about 6 °C was observed along the [110] orientation. The large decrease of recoverable strain and hysteresis with stress (or temperature) was mainly attributed to the difference of elastic moduli of transforming phases.

AB - The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co35Ni35Al30 single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98% in [110], 3% in [100] and 0.30% in [111] orientations, respectively. The Co35Ni35Al30 demonstrated a very high superelastic temperature window of more than 350 °C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal hysteresis of about 6 °C was observed along the [110] orientation. The large decrease of recoverable strain and hysteresis with stress (or temperature) was mainly attributed to the difference of elastic moduli of transforming phases.

KW - CoNiAl

KW - Shape memory alloys

KW - Single crystal

KW - Superelasticity

KW - Two-way shape memory effect

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