2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 5. Zehetbauer Intl. Symp. / SISAM
| Editors: | F. Kongoli, S. Kobe, M. Calin, J.-M. Dubois, T. Turna |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 154 pages |
| ISBN: | 978-1-987820-90-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Grain Boundaries in Severely Deformed Materials: Structure, Properties, and Thermal Evolution
Sergiy Divinski1;1INSTITUTE OF MATERIALS PHYSICS, UNIVERSITY OF MUENSTER, Münster, Germany;
Type of Paper: Invited
Id Paper: 286
Topic: 42
Abstract:
The presentation is focused on structure-property relationship for interfaces in severe plastically deformed (SPD) materials. The results are systematized for different types of SPD treatment, imposed strain, and induced defects, and the deformation parameters used (temperature, total strain and strain rate). The kinetic properties of interfaces in a broad spectrum of severe plastically deformed materials ranging pure metals to alloys, including the high-entropy alloys, are measured. A multi-level hierarchy of short-circuit diffusion paths is shown to be formed in ultrafine grained materials produced by SPD Treatment [1,2]. The key properties of deformation-modified grain boundaries, such as interface width, diffusion rate, free volume excess, are measured and analyzed in detail. A model of the deformation-modified grain boundary state is presented.
Keywords:
Advanced materials; Surfaces and interfaces;References:
[1] G. Reglitz, B. Oberdorfer, N. Fleischmann, J.A. Kotzurek, S.V. Divinski, W. Sprengel, G. Wilde, R. Würschum, Acta Mater 103 (2016) 396.[2] S.V. Divinski, G. Reglitz, I. Golovin, M. Peterlechner, G. Wilde, Acta Mater 82 (2015) 11.