Microstructure Evolution of Mechanically Alloyed ODS Ferritic Steels during Hot Extrusion

Abstract:

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Direct hot extrusion of powder is the standard consolidation process to transform mechanically alloyed Oxide Dispersion Strengthened (ODS) steels into fully dense bars. It is a complex process including several steps. In this study, ODS steel bars were extruded and the material microstructure was characterized by TEM observations associated to SANS after each step. It was shown that the nano-cluster nucleation occurs during the powder pre-heating before hot-extrusion. During extrusion, the ferritic matrix undergoes a dynamic recovery but no further change of the nano-cluster distribution is observed.

Info:

Periodical:

Solid State Phenomena (Volumes 172-174)

Edited by:

Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson

Pages:

721-726

DOI:

10.4028/www.scientific.net/SSP.172-174.721

Citation:

M. Couvrat et al., "Microstructure Evolution of Mechanically Alloyed ODS Ferritic Steels during Hot Extrusion", Solid State Phenomena, Vols. 172-174, pp. 721-726, 2011

Online since:

June 2011

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Price:

$35.00

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