J. Phys. IV France 05 (1995) C8-491-C8-496
Stress Induced Phase Transition of Iron-Rhodium AlloysM. Takahashi1, 2 and R. Oshima3
1 Department of Material Physics, Faculty of Engineering Science, Osaka University, 1-3 Machikaneyamacho Toyonaka 560, Japan
2 Graduate student, Osaka University.
3 Research Institute for Advanced Science Technology, University of Osaka Prefecture, 1-2 Gakuencho Sakai 593, Japan
Stress-induced phase transitions(B2-L10, B2-fcc) on an FeRh alloy were investigated with X-ray diffraction (XRD) and transmission electron microscopy(TEM). An Fe-50.5at%Rh alloy was rolled to 80µm thickness, and annealed at 1370K for 173ks. Annealed sample sheets were cold rolled at various rolling rates, and changes of the sample alloy on the phase state were investigated with XRD. The L10 phase appeared in the early stage of cold work. With heavy work appearance of the fcc phase and consequent decrease of L10 were observed. Destruction of the order of B2 phase was also observed with progress of cold working. The crystallography and morphology of stress induced phases were studied with TEM. L10 phase grains were appeared as layers of about 100 to 1000nm thickness, and density of dislocations in them were extremely high. The separate appearance of fcc phase from L10 phase was found in B2 phase grains. The result is negative to an idea that the L10 phase is an intermediate phase of the B2-fcc transition.
© EDP Sciences 1995