Mean field modelling of dynamic and post-dynamic recrystallization during hot deformation of Inconel 718 in the absence of δ phase particles

Meriem Zouari (1, 2) , Nathalie Bozzolo (1) , Roland E. Logé (3, 1)

1 CEMEF - Centre de Mise en Forme des Matériaux
2 LISI - Laboratoire d'Informatique Scientifique et Industrielle
3 Laboratory of Thermomechanical Metallurgy

Dynamic and post-dynamic recrystallization kinetics were investigated during hot-working of Inconel 718 as a function of temperature, strain and strain rate in the single phase domain. The post-dynamic evolution was found to be extremely fast and impacting significantly the grain size. A two-site mean field model including both dynamic and post-dynamic evolution was used to predict the recrystallized fraction, the average grain size and the stress–strain curves in different thermomechanical conditions.

Mots clés: Hot forging; Hot torsion test; Dynamic recrystallization; Post-dynamic recrystallization; Stress–strain curve; Inconel 718

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Meriem Zouari, Nathalie Bozzolo, Roland E. Logé. Mean field modelling of dynamic and post-dynamic recrystallization during hot deformation of Inconel 718 in the absence of δ phase particles. Materials Science and Engineering: A, 2016, 655, pp.408-424. ⟨10.1016/j.msea.2015.12.102⟩. ⟨hal-01297977⟩