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Article Dans Une Revue Materials Science and Engineering: A Année : 2005

Texture and dislocation structures observation in a dual-phase steel under strain-path changes at large deformation

B. Gardey
  • Fonction : Auteur
V. Richard
  • Fonction : Auteur

Résumé

The aim of the present work is to analyse the evolution of the microstructure of a dual-phase steel in term of dislocation organization under two-stage strain-path changes sequences in connection with the crystallographic grain orientation in order to achieve a more comprehensive explanation of the anisotropic behaviour under complex strain-path changes for these steels at room temperature. The mechanical tests are performed using sequences of simple shear tests and/or uniaxial tensile tests with three different strain-path changes, namely monotonic, Bauschinger and orthogonal loading. After monotonic deformation, well-defined dislocation walls are developed whose orientation depends on the grain orientation. After a Bauschinger strain-path change, a partial dissolution of the preformed dislocation sheets is observed whereas after an orthogonal strain-path change they remain in most grains. However, their number and their orientations become more and more compatible with the last deformation mode, with strain increase.

Dates et versions

hal-02908863 , version 1 (29-07-2020)

Identifiants

Citer

B. Gardey, Salima Bouvier, V. Richard, B. Bacroix. Texture and dislocation structures observation in a dual-phase steel under strain-path changes at large deformation. Materials Science and Engineering: A, 2005, 400-401, pp.136-141. ⟨10.1016/j.msea.2005.01.066⟩. ⟨hal-02908863⟩
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