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Phase relations in the Fe Ni Cr S system and the sulfidation of an austenitic stainless steel

Jacob, KT and Nelson, Howard G and Rao, Bhogeswara D (1979) Phase relations in the Fe Ni Cr S system and the sulfidation of an austenitic stainless steel. In: Oxidation of Metals, 13 (1). pp. 25-55.

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The stability fields of various sulfide phases that form on Fe-Cr, Fe-Ni, Ni-Cr, and Fe-Cr-Ni alloys have been developed as a function of temperature and the partial pressure of sulfur. The calculated stability fields in the ternary A-B-S system are displayed on plots of log \textpS2 pS2 vs. the conjugate extensive variable (nA/nA–nB), which provides a better framework for following the sulfidation of Fe-Cr-Ni alloys at high temperatures. Experimental and estimated thermodynamic data were used in developing the sulfur potential diagrams. Current models and correlations were employed to estimate the unknown thermodynamic behavior of solid solutions of sulfides and to supplement the incomplete phase-diagram data of geophysical literature. These constructed stability field diagrams are in excellent agreement with the sulfide phases and compositions determined experimentally during the sulfidation of SAE 310 stainless steel. The sulfur potential plots appear to be very useful in predicting and correlating the sulfidation of commercial alloys.

Item Type: Journal Article
Publication: Oxidation of Metals
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer.
Keywords: thermochemical diagrams;Fe-Cr-S system;Fe-Ni-S system; Ni-Cr-S system;Fe-Ni-Cr-S system
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 01 Dec 2011 07:35
Last Modified: 01 Dec 2011 07:35
URI: http://eprints.iisc.ac.in/id/eprint/42503

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