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Title: Martensitic transformation of {gamma}-Fe particles during compression of Cu-Fe single crystals in connection with prior coherency loss

Abstract

There have been numerous studies on martensitic transformation (MT) of iron particles embedded in copper single crystals. The precipitate particles of f.c.c. {gamma}-Fe phase have a good coherency with the Cu matrix and do not transform to b.c.c. {alpha}-Fe one on cooling, even down to the liquid helium temperature. Introduction of defects by plastic deformation or ion bombardment, however, cause them to transform to {alpha}-Fe. This kind of particle-matrix system is suitable for studying MT, because MT begins at pre-determined nucleation sites and takes place in discrete volumes providing no autocatalysis. This transformation contrasts with the martensitic reactions in bulk samples. However a mechanism for the MT start in such particles is still not clarified. It was suggested that the MT is initiated with the aid of an applied stress by aiding the lattice shear in {l_brace}111{r_brace}{sub f}{l_angle}211{r_angle}{sub f} systems. In the present study, the effect of {gamma}Fe particle size on the MT was investigated from the standpoint of prior coherency loss.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Electro-Communications, Tokyo (JP)
OSTI Identifier:
20023129
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 39; Journal Issue: 10; Other Information: PBD: 13 Oct 1998; Journal ID: ISSN 1359-6462
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL-PHASE TRANSFORMATIONS; DEFORMATION; COPPER ALLOYS; IRON ALLOYS; MONOCRYSTALS; PARTICULATES; PARTICLE SIZE; MICROSCOPY

Citation Formats

Wusatowska-Sarnek, A M, Miura, Hiromi, and Sakai, Taku. Martensitic transformation of {gamma}-Fe particles during compression of Cu-Fe single crystals in connection with prior coherency loss. United States: N. p., 1998. Web. doi:10.1016/S1359-6462(98)00335-2.
Wusatowska-Sarnek, A M, Miura, Hiromi, & Sakai, Taku. Martensitic transformation of {gamma}-Fe particles during compression of Cu-Fe single crystals in connection with prior coherency loss. United States. doi:10.1016/S1359-6462(98)00335-2.
Wusatowska-Sarnek, A M, Miura, Hiromi, and Sakai, Taku. Tue . "Martensitic transformation of {gamma}-Fe particles during compression of Cu-Fe single crystals in connection with prior coherency loss". United States. doi:10.1016/S1359-6462(98)00335-2.
@article{osti_20023129,
title = {Martensitic transformation of {gamma}-Fe particles during compression of Cu-Fe single crystals in connection with prior coherency loss},
author = {Wusatowska-Sarnek, A M and Miura, Hiromi and Sakai, Taku},
abstractNote = {There have been numerous studies on martensitic transformation (MT) of iron particles embedded in copper single crystals. The precipitate particles of f.c.c. {gamma}-Fe phase have a good coherency with the Cu matrix and do not transform to b.c.c. {alpha}-Fe one on cooling, even down to the liquid helium temperature. Introduction of defects by plastic deformation or ion bombardment, however, cause them to transform to {alpha}-Fe. This kind of particle-matrix system is suitable for studying MT, because MT begins at pre-determined nucleation sites and takes place in discrete volumes providing no autocatalysis. This transformation contrasts with the martensitic reactions in bulk samples. However a mechanism for the MT start in such particles is still not clarified. It was suggested that the MT is initiated with the aid of an applied stress by aiding the lattice shear in {l_brace}111{r_brace}{sub f}{l_angle}211{r_angle}{sub f} systems. In the present study, the effect of {gamma}Fe particle size on the MT was investigated from the standpoint of prior coherency loss.},
doi = {10.1016/S1359-6462(98)00335-2},
journal = {Scripta Materialia},
issn = {1359-6462},
number = 10,
volume = 39,
place = {United States},
year = {1998},
month = {10}
}