Nucleation problems in metallurgy of the solid state: recent developments and open questions

Yves Bréchet, Georges Martin

Research output: Contribution to journalShort SurveyResearchpeer-review

13 Citations (Scopus)

Abstract

Nucleation processes play a key role in the microstructure evolution of metallic alloys during thermomechanical treatments. These processes can involve phase transformations (such as precipitation) and structural instabilities (such as recrystallisation). Although the word 'nucleation' is used in both cases, the situation is profoundly different for precipitation and for recrystallisation on which this article is focussed. In the case of precipitation, species are conserved and the underlying physics is stochastic fluctuations, allowing the apparition of critical germs of the new phase. In the case of recrystallisation, the underlying physical phenomenon is the progressive growth of subgrain structures leading to an unstable configuration, allowing a dislocation free grain to grow at the expense of a dislocated one. The two cases require different types of modelling which are presented in the article. To cite this article: Y. Bréchet, G. Martin, C. R. Physique 7 (2006).

Original languageEnglish
Pages (from-to)959-976
Number of pages18
JournalComptes Rendus Physique
Volume7
Issue number9-10
DOIs
Publication statusPublished - Nov 2006
Externally publishedYes

Keywords

  • Coherent precipitation
  • Recrystallisation

Cite this