The suppression and recovery of martensitic transformation in a Ni-Co-Mn-In magnetic shape memory alloy

Z. L. Wang; D. Y. Cong; Z. H. Nie; J. Gao; W. Liu; Y. D. Wang

doi:10.1016/j.jallcom.2011.08.098

The suppression and recovery of martensitic transformation in a Ni-Co-Mn-In magnetic shape memory alloy

Z. L. Wang, D. Y. Cong, Z. H. Nie, J. Gao, W. Liu, Y. D. Wang^*

^*Corresponding author for this work

School of Material Science and Engineering

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

9 Citations (Scopus)

Abstract

The intrinsic mechanism of the martensitic transformation (MT) suppression observed in Ni-Co-Mn-In alloys fabricated under non-equilibrium conditions still remains mysterious. Here, we used the undercooling technique to obtain a solidified microstructure in non-equilibrium state, subsequently leading to MT suppression even further cooling to 10 K. It was found that primary dendrite-like In-depleted precipitates occurred during solidification under a large undercooling. After a prolonged annealing, the MT interestingly appeared again due to the dissolution of the precipitates and the recovery of equilibrium chemical composition in the matrix.

Original language	English
Pages (from-to)	41-44
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	511
Issue number	1
DOIs	https://doi.org/10.1016/j.jallcom.2011.08.098
Publication status	Published - 15 Jan 2012

Keywords

Magnetic shape memory alloys
Martensitic transformation
Non-equilibrium
Undercooling

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10.1016/j.jallcom.2011.08.098

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abstract = "The intrinsic mechanism of the martensitic transformation (MT) suppression observed in Ni-Co-Mn-In alloys fabricated under non-equilibrium conditions still remains mysterious. Here, we used the undercooling technique to obtain a solidified microstructure in non-equilibrium state, subsequently leading to MT suppression even further cooling to 10 K. It was found that primary dendrite-like In-depleted precipitates occurred during solidification under a large undercooling. After a prolonged annealing, the MT interestingly appeared again due to the dissolution of the precipitates and the recovery of equilibrium chemical composition in the matrix.",

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T1 - The suppression and recovery of martensitic transformation in a Ni-Co-Mn-In magnetic shape memory alloy

AU - Wang, Z. L.

AU - Cong, D. Y.

AU - Nie, Z. H.

AU - Gao, J.

AU - Liu, W.

AU - Wang, Y. D.

PY - 2012/1/15

Y1 - 2012/1/15

N2 - The intrinsic mechanism of the martensitic transformation (MT) suppression observed in Ni-Co-Mn-In alloys fabricated under non-equilibrium conditions still remains mysterious. Here, we used the undercooling technique to obtain a solidified microstructure in non-equilibrium state, subsequently leading to MT suppression even further cooling to 10 K. It was found that primary dendrite-like In-depleted precipitates occurred during solidification under a large undercooling. After a prolonged annealing, the MT interestingly appeared again due to the dissolution of the precipitates and the recovery of equilibrium chemical composition in the matrix.

AB - The intrinsic mechanism of the martensitic transformation (MT) suppression observed in Ni-Co-Mn-In alloys fabricated under non-equilibrium conditions still remains mysterious. Here, we used the undercooling technique to obtain a solidified microstructure in non-equilibrium state, subsequently leading to MT suppression even further cooling to 10 K. It was found that primary dendrite-like In-depleted precipitates occurred during solidification under a large undercooling. After a prolonged annealing, the MT interestingly appeared again due to the dissolution of the precipitates and the recovery of equilibrium chemical composition in the matrix.

KW - Magnetic shape memory alloys

KW - Martensitic transformation

KW - Non-equilibrium

KW - Undercooling

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1

ER -

The suppression and recovery of martensitic transformation in a Ni-Co-Mn-In magnetic shape memory alloy

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Keywords

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