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Phase Formation, Kinetics and Microhardness of the Nitride Layer in Ion Nitrided 316L Stainless Steel

Published online by Cambridge University Press:  26 February 2011

J.T. Blucher ,
K. Marchev ,
S. Gokhale  and
B.C. Giessen
J.T. Blucher
Affiliation:
Department of Mechanical Engineering, Northeastern University, Boston, MA 02115 Barnett Institute of Chemical Analysis and Materials Science, Northeastern University, Boston, MA 02115
K. Marchev
Affiliation:
Department of Chemistry, Northeastern University, Boston, MA 02115 Barnett Institute of Chemical Analysis and Materials Science, Northeastern University, Boston, MA 02115
S. Gokhale
Affiliation:
Department of Mechanical Engineering, Northeastern University, Boston, MA 02115 Barnett Institute of Chemical Analysis and Materials Science, Northeastern University, Boston, MA 02115
B.C. Giessen
Affiliation:
Department of Chemistry, Northeastern University, Boston, MA 02115 Barnett Institute of Chemical Analysis and Materials Science, Northeastern University, Boston, MA 02115
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Abstract

316 L stainless steel (nominally 18% Cr, 8% Ni, 2% Mo, 1% Mn, balance Fe) has been ion nitrided in a N2/H2 atmosphere. Studies of nitride layer depth, structure, composition and microhardness show uniform layer formation with a sharp layer-to-matrix interface and a hardness increase over the bulk value by 600%. The structures of the nitride layers vary with treatment temperature, falling into two regimes over the temperature range studied. Generally, parabolic layer growth was found, and the growth coefficients were determined at five temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 205: Symposium F – Kinetics of Phase Transformations , 1990 , 269
Copyright
Copyright © Materials Research Society 1992

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References

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