Role of glide systems in channel die compression of commercially pure titanium alloy

A Chattopadhyay (1) , L Bao (1, 2) , J-S Lecomte (1) , Y D Zhang (1) , C Schuman (1) , M-J Philippe (1) , C Esling (1)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 Northeastern University [Shenyang]

Plastic deformation process of Ti alloys depends on the competition of active deformation modes: slip and twinning. The specific deformation mechanism depends on the availability of the specific deformation modes as well as on the critical resolved shear stress for slip and the twin activation stress. Effort has been made to provide information on the different slip systems other than prismatic slips, which get activated during the channel die compression process. It is found that, though at the initial stage of deformation, prismatic slip is prevalent, but other slip systems, especially pyramidal types, also appear at the later stage of deformation. Transmission electron microscopy results confirm the presence of pyramidal slips beside prismatic ones. It is also observed that twining does not take place in those grains having the most stable orientation as per the hexagonal close packed system. Information on the critical resolved shear stresses of different glide systems for T40 is also provided.

Mots clés: Ti alloy; Plastic deformation; EBSD; TEM; CRSS

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

A Chattopadhyay, L Bao, J-S Lecomte, Y D Zhang, C Schuman, et al.. Role of glide systems in channel die compression of commercially pure titanium alloy. Materials Science and Technology, 2012, 28 (3), pp.372 - 376. ⟨10.1179/1743284711y.0000000044⟩. ⟨hal-03864479⟩