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Interfacial Structure of the Discontinuously Precipitated Lamellae in Fe-31.3Mn-8.7AI-2.0C Alloy

Published online by Cambridge University Press:  26 February 2011

J.C. Yoon  and
W.K. Choo
J.C. Yoon
Affiliation:
Formally with KAIST, now at Research Institute of Industrial Science and Technology, Pohang, Kyungbuk, Korea
W.K. Choo
Affiliation:
Korea Advanced Institute of Science and Technology, Seoul, Korea
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Abstract

The discontinuous grain boundary (GB) precipitation behavior of rapidly solidified Fe-31.3wt. % Mn-8.7wt.%A1-2.0wt.%C on aging at 923K has been investigated by TEM and X-ray diffraction. The parent matrix was already composed of fcc ɣ phase and perovskite K' carbide of L'12 crystal structure even before the aging treatment. On aging, the matrix precipitation of K' phase out of the -ɣ-phase matrix progressed further, but eventually came to a standstill before the initiation of the DP reaction in the GB. Later on, cells or colonies made up of alternate lamellae of carbon depleted ɣ and carbon enriched K phases of L'12 structure continued to grow. Between the product ɣ and K phases in a cell, near perfect {111} interfaces were found.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 122: Symposium I – Interfacial Structure, Properties, and Design , 1988 , 175
Copyright
Copyright © Materials Research Society 1988

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References

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