TY - JOUR
T1 - Alloy Design for Fe-Ni-Co-Al-based Superelastic Alloys
AU - Tanaka, Y.
AU - Kainuma, R.
AU - Omori, T.
AU - Ishida, K.
N1 - Funding Information:
This study was supported by a Grant-in-Aid for Scientific Research from JSPS, Japan and a Grant for Excellent Graduate Schools from MEXT, Japan.
Publisher Copyright:
© 2015 The Authors.
PY - 2015
Y1 - 2015
N2 - The γ' solvus temperature, the microhardness and the martensitic transformation temperatures were examined for the Fe-Ni-Co-Al-based shape memory alloys. It was found that Fe-28Ni-17Co-11.5Al-2X (X=Ti, Nb and Ta) alloys have a relatively high γ' solvus temperature and that they show high hardness when aged at 600 °C, especially in the case of Ta alloys. Alloy compositions to obtain a high hardness, a small transformation hysteresis and complete reversible transformation were evaluated as being Ni>28%, Co>13%, Al>10% and Ta>2.5%, and the most suitable aging temperature was 600 °C. Grain boundary precipitation of the NiAl-B2 phase was found to be suppressed by the addition of over 0.03 at.% boron.
AB - The γ' solvus temperature, the microhardness and the martensitic transformation temperatures were examined for the Fe-Ni-Co-Al-based shape memory alloys. It was found that Fe-28Ni-17Co-11.5Al-2X (X=Ti, Nb and Ta) alloys have a relatively high γ' solvus temperature and that they show high hardness when aged at 600 °C, especially in the case of Ta alloys. Alloy compositions to obtain a high hardness, a small transformation hysteresis and complete reversible transformation were evaluated as being Ni>28%, Co>13%, Al>10% and Ta>2.5%, and the most suitable aging temperature was 600 °C. Grain boundary precipitation of the NiAl-B2 phase was found to be suppressed by the addition of over 0.03 at.% boron.
KW - Iron-based alloy
KW - Martensitic transformation temperature
KW - Shape memory alloy
KW - Superelastic alloy
KW - γ' phase
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U2 - 10.1016/j.matpr.2015.07.333
DO - 10.1016/j.matpr.2015.07.333
M3 - Article
AN - SCOPUS:84955132259
VL - 2
SP - S485-S492
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
SN - 2214-7853
ER -