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Effects of High Magnetic Field and Tensile Stress on Martensitic Transformation Behavior and Microstructure At 4 K in Fe-Ni-C Alloys

Published online by Cambridge University Press:  21 February 2011

H. Ohtsuka ,
K. Nagai ,
S. Kajiwara ,
H. Kitaguchi  and
M. Uehara
H. Ohtsuka
Affiliation:
E-mail:ohtsuka@nrim.go.jp
K. Nagai
Affiliation:
National Reserch Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305, JAPAN.
S. Kajiwara
Affiliation:
National Reserch Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305, JAPAN.
H. Kitaguchi
Affiliation:
National Reserch Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305, JAPAN.
M. Uehara
Affiliation:
National Reserch Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305, JAPAN.
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Abstract

Effects of high magnetic field and tensile stress on martensitic transformation behavior and microstructure at 4 K have been studied in Fe-31Ni-0.4C and Fe-27Ni-0.8C shape memory alloys. It was found that the critical magnetic field to induce martensitic transformation is between 7.5 T and 10 T. In the case of Fe-27Ni-0.8C, martensitic transformation is stress-induced at lower level of stress in magnetic field than in the case when no magnetic Field is applied. The amount of martensite formed by increasing the magnetic field under constant stress is larger than that formed by increasing the stress in the constant magnetic field.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 398: Symposium C – Thermodynamics and Kinetics of Phase Transformations , 1995 , 519
Copyright
Copyright © Materials Research Society 1998

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References

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