Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals

Y. I. Chumlyakov; I. V. Kireeva; O. A. Kutz; A. S. Turabi; H. E. Karaca; I. Karaman

doi:10.1016/j.scriptamat.2016.03.027

Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals

Y. I. Chumlyakov, I. V. Kireeva, O. A. Kutz, A. S. Turabi, H. E. Karaca, I. Karaman

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

34 Scopus citations

Abstract

The superelastic response of the Fe₄₁Ni₂₈Co₁₇Al_11.5Nb_2.5 (at. %) single crystals oriented along the [001] direction was investigated in tension at various temperatures after aging at 973 K for 0.5 h. The aging treatment led to the formation of ordered γ' particles with particle sizes of less than 3 nm. Abnormally large reversible strain of up to 15.3% was observed at 77 K, the highest ever reported for an iron-based shape memory alloys. It has been revealed that this giant superelastic strain, significantly higher than the theoretical transformation strain, is associated with γ-α' martensitic transformation and elastic mechanical twinning of < 011 >{110} type.

Original language	English
Pages (from-to)	43-46
Number of pages	4
Journal	Scripta Materialia
Volume	119
DOIs	https://doi.org/10.1016/j.scriptamat.2016.03.027
State	Published - Jul 1 2016

Bibliographical note

Publisher Copyright:
© 2016 Published by Elsevier B.V.

Keywords

FeNiCoAlNb
Iron-based shape memory alloys
Superelastic Strain
Superelasticity
Twinning

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2016.03.027

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title = "Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals",

abstract = "The superelastic response of the Fe41Ni28Co17Al11.5Nb2.5 (at. %) single crystals oriented along the [001] direction was investigated in tension at various temperatures after aging at 973 K for 0.5 h. The aging treatment led to the formation of ordered γ' particles with particle sizes of less than 3 nm. Abnormally large reversible strain of up to 15.3% was observed at 77 K, the highest ever reported for an iron-based shape memory alloys. It has been revealed that this giant superelastic strain, significantly higher than the theoretical transformation strain, is associated with γ-α' martensitic transformation and elastic mechanical twinning of < 011 >{110} type.",

keywords = "FeNiCoAlNb, Iron-based shape memory alloys, Superelastic Strain, Superelasticity, Twinning",

author = "Chumlyakov, {Y. I.} and Kireeva, {I. V.} and Kutz, {O. A.} and Turabi, {A. S.} and Karaca, {H. E.} and I. Karaman",

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doi = "10.1016/j.scriptamat.2016.03.027",

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T1 - Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals

AU - Chumlyakov, Y. I.

AU - Kireeva, I. V.

AU - Kutz, O. A.

AU - Turabi, A. S.

AU - Karaca, H. E.

AU - Karaman, I.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - The superelastic response of the Fe41Ni28Co17Al11.5Nb2.5 (at. %) single crystals oriented along the [001] direction was investigated in tension at various temperatures after aging at 973 K for 0.5 h. The aging treatment led to the formation of ordered γ' particles with particle sizes of less than 3 nm. Abnormally large reversible strain of up to 15.3% was observed at 77 K, the highest ever reported for an iron-based shape memory alloys. It has been revealed that this giant superelastic strain, significantly higher than the theoretical transformation strain, is associated with γ-α' martensitic transformation and elastic mechanical twinning of < 011 >{110} type.

AB - The superelastic response of the Fe41Ni28Co17Al11.5Nb2.5 (at. %) single crystals oriented along the [001] direction was investigated in tension at various temperatures after aging at 973 K for 0.5 h. The aging treatment led to the formation of ordered γ' particles with particle sizes of less than 3 nm. Abnormally large reversible strain of up to 15.3% was observed at 77 K, the highest ever reported for an iron-based shape memory alloys. It has been revealed that this giant superelastic strain, significantly higher than the theoretical transformation strain, is associated with γ-α' martensitic transformation and elastic mechanical twinning of < 011 >{110} type.

KW - FeNiCoAlNb

KW - Iron-based shape memory alloys

KW - Superelastic Strain

KW - Superelasticity

KW - Twinning

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JF - Scripta Materialia

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Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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