Determination of the chromium concentration of phase decomposition products in an aged duplex stainless steel

Author: Kuwano Hisashi   Imamasu Hisanao  

Publisher: Springer Publishing Company

ISSN: 0304-3843

Source: Hyperfine Interactions, Vol.168, Iss.1-3, 2006-02, pp. : 1009-1015

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Abstract

A commercial duplex stainless steel has been aged at 673 K for up to 55,000 h. The aging results in the phase decomposition of the ferrite in duplex stainless steel. The end products of the phase decomposition are a Fe-rich and a Cr-rich phase. The chromium concentration of these phases is determined by measuring the hyperfine magnetic field and the isomer shift using Mössbauer effect. The experimental results are compared with a phase diagram calculated for Fe–Cr–Ni ternary system at 673 K.