Modeling of the recrystallization texture: quantification of the nucleation at Cube bands in commercial Al- and Ni-alloys

• Applicant: Professor Dr. Günter Gottstein
• Subject Area: Thermodynamics and Kinetics as well as Properties of Phases and Microstructure of Materials ; Mechanical Properties of Metallic Materials and their Microstructural Origins ; Theoretical Chemistry: Molecules, Materials, Surfaces
• Term: from 2010 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 174141393

The aim of this project is development of recrystallization model for texture and microstructure prediction in commercial Al and Ni alloys. The formation of cube texture in Al sheets and in high temperature super conductors is very much of concern due to strong influence on material properties. The adaptive cellular automat CORe is used for simulation of the recrystallization process. This model was developed during SFB 370 project and allows direct coupling to hardening-, precipitation- and texture models. Thereby, also nucleation processes can be investigated. The focus of this work is the improvement of the cube texture prediction. Special in-situ investigations of the nucleation on cube bands by means of EBSD technique and TEM are essential. Based on experimental results (incubation time, influence of microchemistry, substructure evolution, nucleus number per band etc.) the CORe model should be improved to be able to give the right prediction of recrystallization texture and especially of cube orientation. Experimental investigations should be carried out on commercial Al and Ni-W alloys.

• DFG Programme: Research Grants