TY - JOUR
T1 - Microstructure and Mechanical Properties in B-Doped Fe-31.9Ni-9.6Co-4.7Ti Alloys
AU - Lee, Doyup
AU - Omori, Toshihiro
AU - Kainuma, Ryosuke
N1 - Funding Information:
This study was supported by a Grant-in-Aid from the Japanese Society for the Promotion of Science (JSPS) and by a Grant for Excellent Graduate Schools, Tohoku University, MEXT, Japan.
Publisher Copyright:
© 2016, ASM International.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - Effects of the addition of boron on grain boundary precipitation, martensitic transformation temperatures, and mechanical properties were investigated for Fe-31.9Ni-9.6Co-4.7Ti alloy sheets. Grain boundary precipitation of the η-Ni3Ti phase with the D024 structure, which significantly deteriorates the mechanical properties, is effectively suppressed by the addition of a small amount of B. Both the transformation temperature and the thermal hysteresis slightly increase with increasing B composition. Tensile fracture elongation is improved to be about 1.3 % by addition of 0.05 % B, but no superelastic property was detected in the cyclic stress–strain curve. The features in the mechanical properties are discussed with the texture properties in the sheet specimen.
AB - Effects of the addition of boron on grain boundary precipitation, martensitic transformation temperatures, and mechanical properties were investigated for Fe-31.9Ni-9.6Co-4.7Ti alloy sheets. Grain boundary precipitation of the η-Ni3Ti phase with the D024 structure, which significantly deteriorates the mechanical properties, is effectively suppressed by the addition of a small amount of B. Both the transformation temperature and the thermal hysteresis slightly increase with increasing B composition. Tensile fracture elongation is improved to be about 1.3 % by addition of 0.05 % B, but no superelastic property was detected in the cyclic stress–strain curve. The features in the mechanical properties are discussed with the texture properties in the sheet specimen.
KW - Fe–Ni–Co–Ti
KW - Grain boundary precipitation
KW - Mechanical behavior
KW - Thermoleastic
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U2 - 10.1007/s40830-016-0069-9
DO - 10.1007/s40830-016-0069-9
M3 - Article
AN - SCOPUS:85019853942
SN - 2199-384X
VL - 2
SP - 228
EP - 234
JO - Shape Memory and Superelasticity
JF - Shape Memory and Superelasticity
IS - 2
ER -