A Mössbauer spectrometry study on the phase decomposition of cast duplex stainless steel |
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| Authors: | H Kuwano Y Ishikawa T Yoshimura Y Hamaguchi |
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| Institution: | (1) Muroran Institute of Technology, 27-1 Mizumoto, 050 Muroran, Japan;(2) Mechanical Engineering Research Laboratory, Hitachi, Ltd., 502 Kandatsu, Tsuchiura, 300 Ibaraki, Japan |
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| Abstract: | Cast CF3M duplex stainless steel having 25% of ferrite in volume fraction was aged at 723 K for time periods up to 10000 h. Phase decomposition of ferrite was investigated by Mössbauer spectroscopy. Ferrite decomposed initially via a spinodal process to finally yield the Fe-rich and the Cr-rich phase. The hyperfine magnetic field distribution obtained from the experimental Mössbauer spectrum was analyzed by assuming trinomial distribution of main constituent atoms Fe, Cr, Ni to determine Cr and Ni content of the Fe-rich phase. Main compositions of the phase were 84 at.% Fe, 11 at.% Cr, 5 at.% Ni. |
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