Optical microscopic study on NiCoMnAl metamagnetic shape memory alloy by in situ observation under a pulsed high magnetic field

Xiao Xu; Ineko Katakura; Takumi Kihara; Masashi Tokunaga; Wataru Ito; Rie Y. Umetsu; Ryosuke Kainuma

doi:10.2320/matertrans.MBW201202

Optical microscopic study on NiCoMnAl metamagnetic shape memory alloy by in situ observation under a pulsed high magnetic field

Xiao Xu, Ineko Katakura, Takumi Kihara, Masashi Tokunaga, Wataru Ito, Rie Y. Umetsu, Ryosuke Kainuma

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

8 Citations (Scopus)

Abstract

In situ microscopic study was carried out on Ni_44.3Co _5.1Mn_31.4Al_19.2 metamagnetic shape memory alloy under a pulsed magnetic field up to 35.5 T. Magnetic field-induced reverse martensitic transformation was directly observed. The critical magnetic fields were determined from the contrast change of the microstructure, where good agreement had been found by magnetization measurement in a previous study. Comparison of the micrographs during thermal and magnetic field cycles between Ni₄₅Co₅Mn_36.7In_13.3 and Ni _44.3Co_5.1Mn_31.4Al_19.2 was conducted. It is concluded that though the energy barrier related to thermal activation strongly effects the martensitic transformation of Ni₄₅Co ₅Mn_36.7In_13.3, its effect is very small on Ni_44.3Co_5.1Mn_31.4Al_19.2. Qualitative discussion yielded a reasonable understanding of the results of microstructure observation.

Original language	English
Pages (from-to)	357-362
Number of pages	6
Journal	Materials Transactions
Volume	54
Issue number	3
DOIs	https://doi.org/10.2320/matertrans.MBW201202
Publication status	Published - 2013
Externally published	Yes

Keywords

Heusler alloys
In situ observation
Magnetic field-induced transformation
Martensitic transformation
Metamagnetic shape memory alloy
Pulsed magnetic field

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.MBW201202

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@article{4c942e3e9cfe43fbb190e0bc5ac1f772,

title = "Optical microscopic study on NiCoMnAl metamagnetic shape memory alloy by in situ observation under a pulsed high magnetic field",

abstract = "In situ microscopic study was carried out on Ni44.3Co 5.1Mn31.4Al19.2 metamagnetic shape memory alloy under a pulsed magnetic field up to 35.5 T. Magnetic field-induced reverse martensitic transformation was directly observed. The critical magnetic fields were determined from the contrast change of the microstructure, where good agreement had been found by magnetization measurement in a previous study. Comparison of the micrographs during thermal and magnetic field cycles between Ni45Co5Mn36.7In13.3 and Ni 44.3Co5.1Mn31.4Al19.2 was conducted. It is concluded that though the energy barrier related to thermal activation strongly effects the martensitic transformation of Ni45Co 5Mn36.7In13.3, its effect is very small on Ni44.3Co5.1Mn31.4Al19.2. Qualitative discussion yielded a reasonable understanding of the results of microstructure observation.",

keywords = "Heusler alloys, In situ observation, Magnetic field-induced transformation, Martensitic transformation, Metamagnetic shape memory alloy, Pulsed magnetic field",

author = "Xiao Xu and Ineko Katakura and Takumi Kihara and Masashi Tokunaga and Wataru Ito and Umetsu, {Rie Y.} and Ryosuke Kainuma",

year = "2013",

doi = "10.2320/matertrans.MBW201202",

language = "English",

volume = "54",

pages = "357--362",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

number = "3",

}

TY - JOUR

T1 - Optical microscopic study on NiCoMnAl metamagnetic shape memory alloy by in situ observation under a pulsed high magnetic field

AU - Xu, Xiao

AU - Katakura, Ineko

AU - Kihara, Takumi

AU - Tokunaga, Masashi

AU - Ito, Wataru

AU - Umetsu, Rie Y.

AU - Kainuma, Ryosuke

PY - 2013

Y1 - 2013

N2 - In situ microscopic study was carried out on Ni44.3Co 5.1Mn31.4Al19.2 metamagnetic shape memory alloy under a pulsed magnetic field up to 35.5 T. Magnetic field-induced reverse martensitic transformation was directly observed. The critical magnetic fields were determined from the contrast change of the microstructure, where good agreement had been found by magnetization measurement in a previous study. Comparison of the micrographs during thermal and magnetic field cycles between Ni45Co5Mn36.7In13.3 and Ni 44.3Co5.1Mn31.4Al19.2 was conducted. It is concluded that though the energy barrier related to thermal activation strongly effects the martensitic transformation of Ni45Co 5Mn36.7In13.3, its effect is very small on Ni44.3Co5.1Mn31.4Al19.2. Qualitative discussion yielded a reasonable understanding of the results of microstructure observation.

AB - In situ microscopic study was carried out on Ni44.3Co 5.1Mn31.4Al19.2 metamagnetic shape memory alloy under a pulsed magnetic field up to 35.5 T. Magnetic field-induced reverse martensitic transformation was directly observed. The critical magnetic fields were determined from the contrast change of the microstructure, where good agreement had been found by magnetization measurement in a previous study. Comparison of the micrographs during thermal and magnetic field cycles between Ni45Co5Mn36.7In13.3 and Ni 44.3Co5.1Mn31.4Al19.2 was conducted. It is concluded that though the energy barrier related to thermal activation strongly effects the martensitic transformation of Ni45Co 5Mn36.7In13.3, its effect is very small on Ni44.3Co5.1Mn31.4Al19.2. Qualitative discussion yielded a reasonable understanding of the results of microstructure observation.

KW - Heusler alloys

KW - In situ observation

KW - Magnetic field-induced transformation

KW - Martensitic transformation

KW - Metamagnetic shape memory alloy

KW - Pulsed magnetic field

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DO - 10.2320/matertrans.MBW201202

M3 - Article

AN - SCOPUS:84874434524

SN - 1345-9678

VL - 54

SP - 357

EP - 362

JO - Materials Transactions

JF - Materials Transactions

IS - 3

ER -

Optical microscopic study on NiCoMnAl metamagnetic shape memory alloy by in situ observation under a pulsed high magnetic field

Abstract

Keywords

ASJC Scopus subject areas

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