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Shape Memory and Superelasticity
Published in: Shape Memory and Superelasticity 3/2020

08-09-2020 | Technical Article

Effect of C/O Ratio on Phase Change and Stability of Inclusions in Ti–Ni Alloys Fabricated by a Commercial Production Process

Authors: Fumiyoshi Yamashita, Yasunori Ide, Hiroshi Akamine, Kouji Ishikawa, Minoru Nishida

Published in: Shape Memory and Superelasticity | Issue 3/2020

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Abstract

The effects of carbon/oxygen concentrations in Ti-51 at.% Ni on the morphology and phase changes of inclusions in a commercial wire manufacturing process were investigated. Whereas cast material fabricated with a carbon to oxygen mass concentration ratio (C/O ratio) of 1.0–1.5 were found to contain single-phase Ti(C,O), when hot working was performed, some of the Ti(C,O) exhibited a phase change to Ti2Ni(O), and a mixed phase structure was found in specimens with a C/O ratio of less than 1.5. On the other hand, single-phase Ti(C,O) was found to remain in the wire produced from the specimens with a C/O ratio of 1.5.
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Metadata
Title
Effect of C/O Ratio on Phase Change and Stability of Inclusions in Ti–Ni Alloys Fabricated by a Commercial Production Process
Authors
Fumiyoshi Yamashita
Yasunori Ide
Hiroshi Akamine
Kouji Ishikawa
Minoru Nishida
Publication date
08-09-2020
Publisher
Springer US
Published in
Shape Memory and Superelasticity / Issue 3/2020
Print ISSN: 2199-384X
Electronic ISSN: 2199-3858
DOI
https://doi.org/10.1007/s40830-020-00302-1

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