Utilizing In-Situ Neutron Diffraction for Mesoscale Simulation of Recrystallization Texture in Polycrystalline Aluminum

• Published in: AIP conference proceedings 2012-03
• Main Authors: Radhakrishnan, Bala, Gorti, Sarma, Stoica, Grigoreta, Stoica, Alexandru, Muralidharan, Govindarajan, Thomas, Muth, Wang, Xun-Li
• Format: Article
• Language: English
• ISSN: 0094-243X

Direct modeling of nucleation during recrystallization is difficult because of our inability to capture the details of the complex deformation substructure and their rearrangement. Currently available nucleation models are largely empirically based. We illustrate an approach to model nucleation based on in-situ neutron diffraction to monitor the peak profile changes associated with recovery. Neutron diffraction data are obtained for straight rolled as well as cross-rolled Al-Mg alloy with or without an externally applied stress during annealing. The nucleation model is used in a mesoscale simulation of recrystallization of deformed microstructures calculated by a crystal plasticity based model in order to predict the dependence of the deformation path and the external stress on the recrystallization texture development in the alloy. Research sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the U. S. Department of Energy under Contract No. De-AC05-00OR22725.