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Unusual Rapidity of Electron Beam Transient Tempering

Published online by Cambridge University Press:  26 February 2011

Anjum Tauqir  and
Peter R. Strutt
Anjum Tauqir
Affiliation:
Dept. of Metallurgy & Institute of Material Science, University of Connecticut, Storrs, Connecticut 06268
Peter R. Strutt
Affiliation:
Dept. of Metallurgy & Institute of Material Science, University of Connecticut, Storrs, Connecticut 06268
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Abstract

Electron beam rapid solidification of molybdenum-base high speed steels results in quenched-in metastable phases containing a high concentration of alloying elements. Thermal reprocessing of such material by momentary interaction with the electron beam results in decomposition of martensite at a rate ≈ 100 times faster than that occurring during conventional thermal treatment. It is postulated that this arises from a high concentration of 'defect cluster nucleation sites' during the rapid up-quenching. The product of short thermal treatment is a dispersion of 2–5 nm very fine precipitates identified using transmission electron microscopy as MC type carbides.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 80: Symposium G – Science and Technology of Rapidly Quenched Alloys , 1986 , 299
Copyright
Copyright © Materials Research Society 1987

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