| Biography | |
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 Prof. Laszlo S. Toth Laboratory of Excellence on Design of Alloy Metals for Low-mAss Structures (DAMAS), Université de Lorraine, France |
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| Title: Light weighting of metal structures by metallurgical means; the avenue of severe plastic deformation | |
| Abstract: One way of reducing the mass of a metallic structure is to use stronger metal. A metal with higher yield limit permits to reduce the thickness of a structural element while bearing the same load. Material strengthening of metals can be achieved by producing fine microstructures which can be obtained by alloying or by nano-structuring. Severe plastic deformation (SPD) has been used since long time for reducing the grain size thus, increase the strength via the Hall-Petch effect, without alloying the metal. The research in SPD has been very intensive since about 30 years. New SPD processes were established which permit to approach the theoretical yield limit of metals that are ultra-fine grained or even nano-structured. Such structures are obtained by a grain fragmentation process due to large plastic strains. This lecture will first overview the most well-known SPD processes, then present the latest ones that are able to bring the metal into its limiting stage of grain fragmentation in a single deformation step, thus candidates for industrial applications. Insight will be given on the grain fragmentation process and on the mechanical/thermal stability of the UFG/nano-grained microstructures. | |
| Biography: Laszlo S. TOTH Professor in Mechanics and Metallurgy Director of the Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (‘Labex DAMAS’) Université de Lorraine, Metz, France Prof. Toth is an internationally known personality of the mechanics and materials scientific community since about 1990. He earned his high recognition through his broad knowledge in both mechanics and materials which permits him to make the bridge between these two disciplines. His high standard interdisciplinary activity made him an ideal collaborator in the best laboratories of several countries where he spent long periods. Established now in France, his original scientific activity attracts many excellent foreign scientists for joint research. The recent expertise of Prof. Toth is in the field of experiments and mechanical modeling of textures and microstructures of SPD materials, especially on quantitative modeling of grain refinement. Prof. Toth published 185 refereed papers, his h factor is 47. He founded two laboratories, the laboratory ‘LEM3’ in 2010 counting 160 persons, then the Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures ('DAMAS' – 80 researchers) in 2012 of which he is currently the director. Prof. Toth is the Chairman of the next ICSMA Conference (Int. Conf. on Strength of Materials), June 26 – July 1, 2022, Metz, France, and also the next ICOTOM conference, ICOTOM-20 (Int. Conf. on Textures of Materials) Metz, France, June 26 - 30, 2023. | |
