In-situ synchrotron crystallographic texture characterization during phase transformation at high temperatures in ODS ferritic steel

E. Vakhitova (1) , D. Sornin (1) , J. Wright , M. Francois , N. Lochet (1)

1 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

Texture evolution in a ferritic-martensitic 9wtpercentCr Oxide Dispersion Strengthened (ODS) steels is studied during in-situ heat treatment using synchrotron X-Ray diffraction analysis. The initial texture of cold-formed ODS steel tubes presents a well-known et945;-fiber (<101> -- RD). After high temperature heat treatment, this sharp texture fiber, inherited from cold forming, is still observed. To elucidate the effect of et945;-et61543; phase transformation on the microstructure, diffracted transmission patterns are acquired during the heating-cooling sequence. Initial cold worked texture, holding time and cooling rate influence on the final texture is studied. This study offers a special insight on the crystallographic texture of austenite in ODS steel.

Keywords: ODS steel / Cold Pilgering / Texture memory / Phase Transformation

Domains: Nuclear Experiment [nucl-ex]; Nuclear Theory [nucl-th]

E. Vakhitova, D. Sornin, J. Wright, M. Francois, N. Lochet. In-situ synchrotron crystallographic texture characterization during phase transformation at high temperatures in ODS ferritic steel. Acta Materialia, 2018. ⟨cea-02339834⟩