Variant selection criterion for twin variants in titanium alloys deformed by rolling

S Wang (1, 2) , C Schuman (1, 3) , L Bao (1, 2) , J.S. Lecomte (1) , Y Zhang (1, 3) , J M Raulot (1, 3) , M J Philippe (1, 3) , X Zhao (1, 3) , C Esling (1, 3)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 Key Laboratory for Anisotropy and Texture of Materials
3 LETAM - Laboratoire d'étude des textures et application aux matériaux

A new selection criterion to explain the activation of the twinning variant is proposed based on the calculation of the deformation energy to create a primary twin. The calculation takes into account the effect of the grain size using a Hall–Petch-type relation. This criterion allows very good prediction for the variant selection to be obtained. The calculations are compared with the experimental results obtained on T40 deformed by rolling.

Mots clés: Titanium (Ti); Plastic deformation mechanism; Twinning; Twin variant selection; Schmid factor

Domaines: Mécanique des matériaux [physics.class-ph]

S Wang, C Schuman, L Bao, J.S. Lecomte, Y Zhang, et al.. Variant selection criterion for twin variants in titanium alloys deformed by rolling. Acta Materialia, 2012, 60 (9), pp.3912 - 3919. ⟨10.1016/j.actamat.2012.03.046⟩. ⟨hal-03864487⟩