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Amorphous Phase Formation in NiTi During Cold Rolling

Published online by Cambridge University Press:  28 February 2011

J. Koike ,
D. M. Parkin  and
M. Nastasi
J. Koike
Affiliation:
Center for Materials Science, Los Alamos National Laboratory, Los Alamos, NM 87545
D. M. Parkin
Affiliation:
Center for Materials Science, Los Alamos National Laboratory, Los Alamos, NM 87545
M. Nastasi
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

The intermetallic compound NiTi was cold rolled at room temperature. Amorphous bands were formed within the finely twined crystalline matrix after thickness reduction of 60%. Striking similarities were observed in microstructural morphology between amorphous bands and shear bands that are generally observed in heavily cold-rolled pure metals. We suggest from the present observations together with the reported results in other solid-state amorphization experiments that the amorphous bands are produced in the shear bands, and that amorphization is caused by mechanical instability against the shear stress.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 186: Symposium I – Alloy Phase Stability and Design , 1990 , 161
Copyright
Copyright © Materials Research Society 1991

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References

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