Microstructure Control in Materials

Microstructure Control in Materials Research Group

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Description of Activities

The core activities are related to the development of polycrystalline systems with predefined properties via tunning thermomechanical processing parameters. The research focuses on the design of advanced materials, experimental characterization of microstructures and modelling of technological processes. In the field of innovative manufacturing, the impact of technological parameters on product properties is less known compared to conventional processes and initial results indicate promising research directions. The main objective is related to the integration of multiple efficient modelling strategies and creation of a virtual manufacturing platform that not only enables the production of materials in a virtual space but also ensures control over real manufacturing processes and allows for in-situ changes in manufacturing parameters depending on the desired final properties. Thus, multiple hidden aspects of manufacturing processes can become apparent. 

Research Interests

Research interests in Materials Science and Technology: thermomechanical processing of polycrystalline materials 

• Investigation of mesoscopic changes in metals: microstructural and crystallographic aspects. 
• Modelling the deformation flow by finite element models. 
• Modelling the deformation processes by the finite element modell, flow-line method and analytical approaches. 
• Materials characterization by means of Scanning and Orientation Imaging Microscopy. 
• Modelling the texture evolution during deformation employing Taylor-type crystal plasticity homogenization schemes: Full Constraints Taylor model, Visco-Plastic Self-Consistent model, Advanced Lamel model, Cluster V model. 
• Prediction of crystallographic changes in metals during recrystallization by principles of continuum mechanics and crystal plasticity theory. 
• Modelling the plastic anisotropy in metals: Prediction of plastic strain ratio by various crystal plasticity approaches. 

Research/service concepts/Methodology

• Materials Characterization by Scanning Electron Microscopy, Electron Backscattering Diffraction and Electron Dispersive Analysis; 
• Mechanical Properties Testing by Nanoindentation and Microhardness technigues, Tensile and Charpy tests; 
• Numerical Approaches used for through process modelling: Finite Element Models, Flow Line Models, Crystal Plasticity Models, Recrystallization Models. 

Research Staff

• Prof. Dr. Jurij Sidor, DSc, Group Leader 
• Dr. Fenyvesi Dániel, Associate Professor, Senior Researcher
• Dr. Borbély Tibor, Associate Professor, Senior Researcher 
• Bátorfi János, PhD Student, research assistant
• Pál Gyula, Assistant Lecturer, research assistant
• Purnima Chakravarty, PhD Student, research assistant
• Tóth János, research technican 
• Number of BSc and MSc Students are employed for conducting project subtasks.

Projects

The research group has been involved in the following projects: 

• Security and data protection in the fields of material technology, industry 4.0 and energy engineering (2022-2025, pillar 3 in the project no. TKP2021-NVA-29 “Protection of high integrity national services and industrial infrastructures using cybersecurity, technological and legislative instruments”). 
• Innovative processing technologies, applications in energy engineering, and wide-range microstructure investigation techniques (2017-2021, workgroup 5 in the project EFOP-3.6.1-16-2016-00018 “Improving the role of research + development + innovation in the higher education through institutional developments assisting intelligent specialization in Sopron and Szombathely”). 
• OTKA. Modelling and complex experimental evaluation of texture dependent solid phase reactions in metallic systems (Project nr.: 119566). 

5 important publications in the field

• Sidor, J., Miroux, A., Petrov, R. and Kestens, L. (2008) ‘Microstructural and crystallographic aspects of conventional and asymmetric rolling processes‘, Acta Materialia, 56, pp. 2495–2507.
• Sidor, J., Petrov, R. H. and Kestens, L. A. I. (2010) ‘Deformation, recrystallization and plastic anisotropy of asymmetrically rolled aluminum sheets‘, Materials Science And Engineering A, 528, pp. 413–424.
• Sidor, J. J., Verbeken, K., Gomes, E., Schneider, J., Calvillo, P. R. and Kestens, L. A. I. (2012) ‘Through process texture evolution and magnetic properties of high Si non-oriented electrical steels‘, Materials Characterization, 71, pp. 49–57.
• Sidor, J. J., Decroos, K., Petrov, R. H. and Kestens, L. A. I. (2015) ‘Evolution of recrystallization textures in particle containing Al alloys after various rolling reductions: experimental study and modeling‘, International Journal of Plasticity, 66, pp. 119–137.
• Chakravarty, P., Pál, Gy., Sidor, J. J. (2022) ‘The dependency of work hardening on dislocation statistics in cold rolled 1050 aluminum alloy‘. Materials Characterization, 191, pp. 112166:1–112166:13.

Infrastructure

http://smi.inf.elte.hu/laboratechnika/