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Lecture

Role of plasticity on the formation of acicular microstructures in metallic alloys

Wednesday (26.09.2018)
11:30 - 11:45 S1/01 - A4
Part of:


When thinking about the microstructures associated with plasticity, dislocation patterning and eventually grain boundary come naturally to mind. The role that plasticity may play on the microstructures ensuing from phase transformations is much less known, and it is very often believed that this role is only to relax the stresses generated by the transformations, destroying any shapes and patterning induced by elasticity.

In this contribution, we will show that the previous claim does not apply in the case of acicular microstructures formed in many metallic alloys displaying allotropic transformations, such as steels, titanium alloys or brass. In particular, we will show by means of phase field calculations that plasticity is an important ingredient to account for to predict realistic sizes compliant with observations of Widmanstätten plates.

Speaker:
Prof. Benoit Appolaire
Institut Jean Lamour
Additional Authors:
  • Hocine Lebbad
    National Center for Scientific Research (CNRS) / ONERA
  • Prof. Dr. Yann Le Bouar
    National Center for Scientific Research (CNRS) / ONERA
  • Prof. Dr. Alphonse Finel
    National Center for Scientific Research (CNRS) / ONERA