{{Short description|Hungarian-French materials scientist}}
{{use dmy|date=April 2026}} {{Infobox academic | name = Laszlo S. Toth |image = Laszlo S. Toth.jpg |caption = Toth in 2026 |occupation = Physicist, materials scientist, and academician | education = M.S., Physics and Astronomy<br>Ph.D., Solid-State Physics | alma_mater = Eötvös Loránd University | workplaces = University of Lorraine (France)<br>University of Miskolc (Hungary) }} '''Laszlo S. Toth''' is a physicist, materials scientist, and academician. He is a professor emeritus at the University of Lorraine, Doctor Honoris Causa and Professor Miskolcinensis at the University of Miskolc.
Toth's research interests are materials science, deformation mechanics, and microstructure modeling. He was made an external member of the Hungarian Academy of Sciences in 2025.
==Education== Toth completed his Master's degree in Physics and Astronomy at Eötvös Loránd University (ELTE) in 1976. Afterwards, he received his Ph.D. in Solid-State Physics in 1979, and the Candidate Degree at the Hungarian Academy of Sciences in 1986.<ref name=cv>{{Cite web|url=https://lem3.univ-lorraine.fr/wp-content/uploads/2026/03/cv-laszlostoth-2026-short-v2.pdf|title=CV-Laszlo Toth|website=univ-lorraine.fr|access-date=April 1, 2026}}</ref>
==Career== Toth began his academic career as a lecturer and researcher at ELTE in 1976. He subsequently worked at McGill University and the Catholic University of Louvain before joining the University of Metz (France) in 1992. He assumed the role of professor at Metz in 1998 and was appointed the first director of the Laboratory for the Study of Microstructures and Mechanics of Materials from 2010 to 2012. In 2012, he founded the Labex DAMAS research center, which he directed until 2021.<ref name=drum>{{Cite web|url=https://factuel.univ-lorraine.fr/article/laszlo-toth-docteur-honoris-causa-de-luniversite-de-miskolc/|title=Laszlo TOTH, Doctor Honoris Causa of the University of Miskolc|website=factuel.univ-lorraine.fr|access-date=December 18, 2025}}</ref> He is a professor emeritus at the University of Lorraine in France.<ref>{{Cite web|url=https://lem3.univ-lorraine.fr/fiche-membre/toth-laszlo/|title=TOTH Laszlo|website=univ-lorraine.fr|access-date=December 5, 2025}}</ref> Additionally, he is professor "Miskolcinensis" at the University of Miskolc in Hungary,<ref name=drum/> and an external member of the Hungarian Academy of Sciences.<ref name=ext>{{Cite web|url=https://lem3.univ-lorraine.fr/actualites/laszlo-toth-elu-membre-externe-de-lacademie-des-sciences-de-hongrie/|title=Laszlo Toth elected external member of the Hungarian Academy of Sciences|website=univ-lorraine.fr|access-date=December 5, 2025}}</ref>
==Research== Toth's research has focused on crystal plasticity, crystallographic textures in metals, mechanics of materials, and severe plastic deformation. He proposed a viscoplastic model that regularizes the Taylor ambiguity problem in crystal plasticity,<ref>{{cite journal |last1=Vanhoutte |first1=P |title=Deformation texture prediction: from the Taylor model to the advanced Lamel model |journal=International Journal of Plasticity |date=March 2005 |volume=21 |issue=3 |page=595 |doi=10.1016/j.ijplas.2004.04.011}}</ref> a grain fragmentation model based on lattice curvature,<ref>{{cite journal |last1=Estrin |first1=Y. |last2=Vinogradov |first2=A. |title=Extreme grain refinement by severe plastic deformation: A wealth of challenging science |journal=Acta Materialia |date=February 2013 |volume=61 |issue=3 |page=794 |doi=10.1016/j.actamat.2012.10.038}}</ref> and proposed a scalar interaction parameter by tuning the self-consistent predictions with the finite element results.<ref>{{cite journal |last1=Wang |first1=H. |last2=Wu |first2=P.D. |last3=Boyle |first3=K.P. |last4=Neale |first4=K.W. |title=On crystal plasticity formability analysis for magnesium alloy sheets |journal=International Journal of Solids and Structures |date=March 2011 |volume=48 |issue=6 |page=1002 |doi=10.1016/j.ijsolstr.2010.12.004}}</ref> He also explored elasto-visco-plastic behavior,<ref>{{cite journal |last1=Duchêne |first1=Laurent |last2=Habraken |first2=Anne Marie |title=Multiscale Approaches |journal=Advances in Material Forming |date=2007 |page=130 |doi=10.1007/978-2-287-72143-4_8}}</ref> and established a dislocation density-based general strain hardening model,<ref name=brr>{{cite journal |last1=Mishra |first1=A |last2=Kad |first2=B |last3=Gregori |first3=F |last4=Meyers |first4=M |title=Microstructural evolution in copper subjected to severe plastic deformation: Experiments and analysis |journal=Acta Materialia |date=January 2007 |volume=55 |issue=1 |page=14 |doi=10.1016/j.actamat.2006.07.008}}</ref> presented a flow line function based deformation analysis,<ref>{{cite journal |last1=Khanlari |first1=H. |last2=Honarpisheh |first2=M. |title=Investigation of Microstructure, Mechanical Properties and Residual Stress in Non-equal-Channel Angular Pressing of 6061 Aluminum Alloy |journal=Transactions of the Indian Institute of Metals |date=May 2020 |volume=73 |issue=5 |page=1109 |doi=10.1007/s12666-020-01945-5}}</ref> and introduced new approaches for strain hardening.<ref name=brr/> Along with his colleagues, he was the first to propose high-pressure tube twisting<ref>{{cite journal |last1=Djavanroodi |first1=Faramarz |last2=Zolfaghari |first2=Ali Asghar |last3=Ebrahimi |first3=Mahmoud |last4=Nikbin |first4=Kamran |title=Route Effect on Equal Channel Angular Pressing of Copper Tube |journal=Acta Metallurgica Sinica (English Letters) |date=February 2014 |volume=27 |issue=1 |page=96 |doi=10.1007/s40195-014-0028-4}}</ref> and has conducted simulations which showed that the sliding of grain boundaries caused a randomization of nanocrystallines.<ref>{{cite journal |last1=Sathiaraj |first1=G. Dan |last2=Pukenas |first2=Aurimas |last3=Skrotzki |first3=Werner |title=Texture formation in face-centered cubic high-entropy alloys |journal=Journal of Alloys and Compounds |date=June 2020 |volume=826 |page=12 |doi=10.1016/j.jallcom.2020.154183}}</ref> He also employed a kinematic model equation for twinning behavior, which used crystal plasticity principles.<ref>{{cite journal |last1=Liu |first1=Famei |last2=Tang |first2=Xuefeng |last3=Jin |first3=Junsong |last4=Deng |first4=Lei |last5=Wang |first5=Xinyun |last6=Long |first6=Jinchuan |last7=Chai |first7=Fangtao |title=A constitutive model incorporating the interplay of dynamic recrystallization and twinning during hot deformation of AZ31 magnesium alloy |journal=Journal of Materials Research and Technology |date=January 2024 |volume=28|page=1991|doi=10.1016/j.jmrt.2023.12.140}}</ref>
==Awards and honors== *2012 – Grand Prize of Research, Society of East-Industry of France<ref name=drum/> *2012 – Knight of Higher Education in France, University of Lorraine<ref name=drum/> *2021 – Professor Miskolcinensis, University of Miskolc<ref name=misko/> *2023 – Doctor Honoris Causa – University of Miskolc<ref name=misko>{{cite web|url=https://factuel.univ-lorraine.fr/article/laszlo-toth-docteur-honoris-causa-de-luniversite-de-miskolc/|title=Laszlo TOTH, Docteur Honoris Causa de l'Université de Miskolc|website=univ-lorraine.fr|access-date=December 5, 2025}}</ref> *2025 – External member, Hungarian Academy of Sciences<ref name=ext/>
==Selected articles== *{{cite journal|title=Effect of rate sensitivity on the stability of torsion textures|first1=L.S|last1=Toth|first2=P|last2=Gilormini|first3=J.J|last3=Jonas|journal=Acta Metallurgica|volume=36|issue=12|pages=3077–3091|date=1988|doi=10.1016/0001-6160(88)90045-4}} *{{cite journal |title=A model of grain fragmentation based on lattice curvature |first1=L. S. |last1=Tóth |first2=Y. |last2=Estrin |first3=R. |last3=Lapovok |first4=C. |last4=Gu |journal=Acta Materialia |volume=58 |issue=5 |pages=1782–1794 |date=2010 |doi=10.1016/j.actamat.2009.11.020}} *{{cite journal |title=Ultrafine-grain metals by severe plastic deformation |first1=L. S. |last1=Toth |first2=C. |last2=Gu |journal=Materials Characterization |volume=92 |pages=1–14 |date=2014|doi=10.1016/j.matchar.2014.02.003}} *{{cite journal |title=Geometrically necessary dislocations favor the Taylor uniform deformation mode in ultra-fine-grained polycrystals |first1=L. S. |last1=Toth |first2=C. F. |last2=Gu |first3=B. |last3=Beausir |first4=J. J. |last4=Fundenberger |first5=M. |last5=Hoffman |journal=Acta Materialia |volume=117 |pages=35–42 |date=2016 |doi=10.1016/j.actamat.2016.06.062}} ==References== {{reflist}} {{Authority control}} {{DEFAULTSORT:Toth, Laszlo S.}} Category:Living people Category:1952 births Category:Physicists Category:Members of the Hungarian Academy of Sciences Category:Eötvös Loránd University alumni Category:Academic staff of the University of Lorraine