'The brittle-to-ductile transition .1. A cooperative dislocation generation instability .2. Dislocation dynamics and the strain rate dependence of the transition temperature''' - Comment

Journal article

P.B. Hirsch and S.G. Roberts (HR) maintain that the model for the brittle-to-ductile transition and its strain rate-dependence proposed by Khantha, Pope and Vitek (KPV) and Khantha (MK), respectively, is inaccurate. HR believe that on the KPV model, the sharp transition is inherently strain rate-independent because the model does not take into account dislocation/lattice interactions which cause velocity-dependent lattice friction stress. As to the MK hypothesis for the strain rate dependence of transition temperature, it does not work for the experimentally observed strain rate-dependent sharp transition for Si, which has been shown to be structure sensitive.

Authors: Hirsch, P; Roberts, S

• Publication status: Published
• Publisher: Pergamon Press Inc
• Journal: SCRIPTA MATERIALIA
• Volume: 35
• Issue: 2
• Pages: 291-295
• Publication date: 1996-07-15
• DOI: 10.1016/1359-6462(96)00114-5
• ISSN: 1359-6462
• Language: English