Shape memory effect associated with FCC-HCP martensitic transformation on Co-Al alloys

Toshihiro Omori; Yuji Sutou; Katsunari Oikawa; Ryosuke Kainuma; Kiyohito Ishida

doi:10.2320/matertrans.44.2732

Shape memory effect associated with FCC-HCP martensitic transformation on Co-Al alloys

Toshihiro Omori, Yuji Sutou, Katsunari Oikawa, Ryosuke Kainuma, Kiyohito Ishida

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

20 Citations (Scopus)

Abstract

The martensitic transformation and shape memory (SM) effect in Co-Al alloys containing 0-16at%Al were investigated by differential scanning calorimetry (DSC) and bending tests. It was found that the martensitic transformation temperatures decrease and the thermal hystereses increase with increasing Al content. It was also found that an incomplete SM effect occurring in pure Co can be enhanced by the addition of Al over 4 at% and that Co-Al alloys containing Al over 10at% show an excellent SM effect. Co-Al SM alloys possessing high reverse transformation temperatures over 200°C and martensitic transformation in the ferromagnetic state show promise as a new type of SM alloys.

Original language	English
Pages (from-to)	2732-2735
Number of pages	4
Journal	Materials Transactions
Volume	44
Issue number	12
DOIs	https://doi.org/10.2320/matertrans.44.2732
Publication status	Published - 2003 Dec

Keywords

Cobalt-aluminum
High-temperature shape memory alloy
Martensitic transformation temperature
Shape memory effect
ε martensite

ASJC Scopus subject areas

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

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10.2320/matertrans.44.2732

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title = "Shape memory effect associated with FCC-HCP martensitic transformation on Co-Al alloys",

abstract = "The martensitic transformation and shape memory (SM) effect in Co-Al alloys containing 0-16at%Al were investigated by differential scanning calorimetry (DSC) and bending tests. It was found that the martensitic transformation temperatures decrease and the thermal hystereses increase with increasing Al content. It was also found that an incomplete SM effect occurring in pure Co can be enhanced by the addition of Al over 4 at% and that Co-Al alloys containing Al over 10at% show an excellent SM effect. Co-Al SM alloys possessing high reverse transformation temperatures over 200°C and martensitic transformation in the ferromagnetic state show promise as a new type of SM alloys.",

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T1 - Shape memory effect associated with FCC-HCP martensitic transformation on Co-Al alloys

AU - Omori, Toshihiro

AU - Sutou, Yuji

AU - Oikawa, Katsunari

AU - Kainuma, Ryosuke

AU - Ishida, Kiyohito

PY - 2003/12

Y1 - 2003/12

N2 - The martensitic transformation and shape memory (SM) effect in Co-Al alloys containing 0-16at%Al were investigated by differential scanning calorimetry (DSC) and bending tests. It was found that the martensitic transformation temperatures decrease and the thermal hystereses increase with increasing Al content. It was also found that an incomplete SM effect occurring in pure Co can be enhanced by the addition of Al over 4 at% and that Co-Al alloys containing Al over 10at% show an excellent SM effect. Co-Al SM alloys possessing high reverse transformation temperatures over 200°C and martensitic transformation in the ferromagnetic state show promise as a new type of SM alloys.

AB - The martensitic transformation and shape memory (SM) effect in Co-Al alloys containing 0-16at%Al were investigated by differential scanning calorimetry (DSC) and bending tests. It was found that the martensitic transformation temperatures decrease and the thermal hystereses increase with increasing Al content. It was also found that an incomplete SM effect occurring in pure Co can be enhanced by the addition of Al over 4 at% and that Co-Al alloys containing Al over 10at% show an excellent SM effect. Co-Al SM alloys possessing high reverse transformation temperatures over 200°C and martensitic transformation in the ferromagnetic state show promise as a new type of SM alloys.

KW - Cobalt-aluminum

KW - High-temperature shape memory alloy

KW - Martensitic transformation temperature

KW - Shape memory effect

KW - ε martensite

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Shape memory effect associated with FCC-HCP martensitic transformation on Co-Al alloys

Abstract

Keywords

ASJC Scopus subject areas

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