Version 1
: Received: 10 May 2020 / Approved: 11 May 2020 / Online: 11 May 2020 (03:33:40 CEST)
How to cite:
Degtyarev, M.I.; Chashchukhina, T.I.; Voronova, L.M.; Patselov, A.M.; Pilyugin, V.P.; Talantsev, E.F. An Empirical Model of Submicrocrystalline Structure Formation and Hardening upon Severe Plastic Deformation in Iron. Preprints2020, 2020050185. https://doi.org/10.20944/preprints202005.0185.v1.
Degtyarev, M.I.; Chashchukhina, T.I.; Voronova, L.M.; Patselov, A.M.; Pilyugin, V.P.; Talantsev, E.F. An Empirical Model of Submicrocrystalline Structure Formation and Hardening upon Severe Plastic Deformation in Iron. Preprints 2020, 2020050185. https://doi.org/10.20944/preprints202005.0185.v1.
Cite as:
Degtyarev, M.I.; Chashchukhina, T.I.; Voronova, L.M.; Patselov, A.M.; Pilyugin, V.P.; Talantsev, E.F. An Empirical Model of Submicrocrystalline Structure Formation and Hardening upon Severe Plastic Deformation in Iron. Preprints2020, 2020050185. https://doi.org/10.20944/preprints202005.0185.v1.
Degtyarev, M.I.; Chashchukhina, T.I.; Voronova, L.M.; Patselov, A.M.; Pilyugin, V.P.; Talantsev, E.F. An Empirical Model of Submicrocrystalline Structure Formation and Hardening upon Severe Plastic Deformation in Iron. Preprints 2020, 2020050185. https://doi.org/10.20944/preprints202005.0185.v1.
Abstract
The evolution of metals micro/nano-structure upon severe plastic deformation (SPD) is still far to be theoretically explained, while experimental datasets are persistently growing for several decades. Major problem associated with understanding of SPD is related to a fact that the latter is a synergetic product of several competing physical effects which alter the material micro/nano-structure. In attempt to find deformational boundaries, where predominantly one mechanism determines the micro/nano-structure, in this paper we propose a continuous piecewise model for the analysis of experiments on material hardness vs strain of SPD processed materials. The novelty of this approach lies in its ability to find, as free-fitting parameters, the strain breakpoints which separate different micro/nano-structure modes generated upon SPD process. The model is applied to analyse experimental data for polycrystalline samples of pure iron and two distinctive strain breakpoints are revealed with good accuracies. This finding is in a good agreement with our earlier results on TEM microscopy studies on pure iron polycrystals after SPD treatment.
Keywords
severe plastic deformation; iron hardness; micro/nano-structure
Subject
MATERIALS SCIENCE, General Materials Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
