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HomeSolid State PhenomenaSolid State Phenomena Vols. 172-174Microstructure Evolution of Mechanically Alloyed...

Microstructure Evolution of Mechanically Alloyed ODS Ferritic Steels during Hot Extrusion

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Abstract:

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.

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Periodical:

Solid State Phenomena (Volumes 172-174)

Pages:

721-726

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.172-174.721

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Online since:

June 2011

Authors:

Mathieu Couvrat, Laurent Chaffron, Daniel Nunes, Patrick Bonnaillie, Marie Hélène Mathon, Mikael Perrut

Keywords:

Hot Extrusion, Mecachrome, Mechanical Alloy, ODS Steel, SAN, TEM

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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