recrystallisation; coupling; Numerical model; LiMaRC - Liège Materials Research Center
Abstract :
[en] The recrystallisation model is based on the model developed by Kopp [1,2]. This model is implemented in our finite element code "lagamine" and is coupled with a thermomechanical elasto-visco-plastic law. It assumes that each integration point in the mesh is represented by a number of sub-structures with a different volumic recrystallised fraction. In order to be able to calibrate such a model, we need to perform a lot of experimentals tests. Hot compression tests on small cylinder at different temperatures and strain rates are made till strain level from 0.1 up to 0.7. The compressed cylinders are quenched after the tests. A metallographic study of the quenched cylinders gives the recrystallised fraction function of the strain, the strain rate and temperature. So experimental, numerical and metallographic studies of hot compression tests aim the definition of an accurate predictive thermo-mechanic metallurgical model able to stimulate forging processes.
Disciplines :
Materials science & engineering
Author, co-author :
Charles, J. F.
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Lecomte-Beckers, Jacqueline ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Language :
English
Title :
Integration of recrystallisation model coupled with an elasto-visco-plastic law - Experimental tests and calibration of this model
Publication date :
1999
Event name :
2nd ESAFORM Conference on Material Forming
Event place :
Guimaraes, Portugal
Audience :
International
Main work title :
Proceedings of the 2nd ESAFORM Conference on Material Forming
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