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Multicomponent phase diagrams applicable to austenitic stainless steels at 600 and 650°c

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Abstract

The experimental Fe-Ni-Cr ternary diagrams are extended into the quaternaryX-field forX = Mo, Ti, Mn, Si, Nb, Ta using pair potential models for the fcc, bcc and sigma phases and free energy relations deduced for the Fe-Ni-Cr system by Kaufman and Nesor. The constrained diagrams for constant pctX are in agreement with observations made by others. Also, a correlation is found between the calculated effect of a given addition ofX on the difference in energies between the sigma and fcc phases and its Cr equivalent deduced empirically from impact energy measurements by Hull. It is suggested that the procedures developed in this investigation should have wide applicability in alloy design. In particular, it may be helpful in discovering sigma free compositions for stainless steels.

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Authors and Affiliations

  1. Columbia University, Henry Krumb School of Mines, Columbia University, 10027, New York, N.Y.

    J. Shao (Research Assistant)

  2. IBM Research Laboratory, Henry Krumb School of Mines, presently Visiting Scientist, USA

    E. S. Machlin (Professor of Metallurgy)

Authors
  1. J. Shao
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  2. E. S. Machlin
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Shao, J., Machlin, E.S. Multicomponent phase diagrams applicable to austenitic stainless steels at 600 and 650°c. Metall Trans A 10, 585–590 (1979). https://doi.org/10.1007/BF02658321

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  • DOI: https://doi.org/10.1007/BF02658321

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