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Ultrafine-grain metals by severe plastic deformation

Abstract : As a relatively simple top-down technique to produce nanomaterials in bulk, severe plastic deformation became a new way of transforming the microstructure of the material. When carried out at sufficiently low temperature, extreme large plastic deformations lead to ultrafine-grain or nearly nano-structured material. The aim of the present tutorial review is to give basic insight into the field of ultrafine-grain materials obtained by severe plastic deformation. The main features of the obtained microstructures are presented, the most important advantage of ultrafine-grain materials - an enhanced mechanical strength with respect to their coarse grained counterparts - is discussed. The operating deformation mechanisms that lead to the grain refinement are also examined. Finally, dynamic recrystallization which produces the ultrafine-grain structure is characterized and the main results of modeling efforts reproducing the grain refinement and several microstructure features are presented.
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Submitted on : Tuesday, April 25, 2017 - 2:28:49 PM
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Laszlo S. Toth, Chengfan Gu. Ultrafine-grain metals by severe plastic deformation. Materials Characterization, Elsevier, 2014, 92, pp.1-14. ⟨10.1016/j.matchar.2014.02.003⟩. ⟨hal-01513742⟩



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