Speaker: István Groma (ELTE, Wigner RCP)
Title: Statistical physics of dislocations
Date: Tuesday 17 March, 10:00
Place: Building 1, Conference room
Abstract:
The concept of dislocations was introduced in 1934 by Hungarian scientists Orován and Polányi, along with the British scientist Taylor. Since then, there has been a continuous research activity in this field in Hungary. In the first part of the talk, some key results obtained on dislocations in Hungary during the past 50 years are summarized.
Nowadays, the main focus of dislocation research is to develop an appropriate statistical physics-based continuum theory of dislocations. Since dislocations form a dissipative system with long-range interactions, and the dislocation motion is restricted to slip planes, the traditional method of statistical physics cannot be applied in a straightforward manner. In the talk, a systematic approach is presented that leads to a phase field-like theory.
