J. Phys. IV France 03 (1993) C8-317-C8-320
SANS study of phase decomposition in Fe-Cu alloy added by Ni and MnK. OSAMURA1, H. OKUDA1, K. ASANO1, M. FURUSAKA2, K. KISHIDA3 and F. KUROSAWA4
1 Mesoscopic Materials Research Center, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto 606, Japan
2 National Laboratory for High Energy Physics, Oho, Tsukuba-Shi, 305, Japan
3 Central Research Institute, Nippon Steel Co., Hirohata, Himeji 671-11, Japan
4 Research Institute for Steels, Nippon Steel Co., Futtsu, Chiba 299-12, Japan
Small-angle neutron scattering (SANS) measurements were mainly carried out in order to investigate the structure change during early stage of phase decomposition in Fe-Cu-Ni-Mn quaternary alloy. The fact that the nuclear Guinier radius becomes larger than the magnetic one beyond about 2 nm is attributed to the formation of segregated layer enriched by Ni and Mn around fcc copper-rich precipitate. The calculated SANS intensities have been well fitted simultaneously with both experimental data of magnetic and nuclear components. Addition of Ni and Mn in Fe-Cu binary alloy was suggested to promote the precipitation reaction of ε-Cu phase.
© EDP Sciences 1993