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Growth of extrusions in localized cyclic plastic straining
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SYSNO ASEP 0317052 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Growth of extrusions in localized cyclic plastic straining Title Růst extruzí v důsledku lokalizované cyklické plastické deformace Author(s) Polák, Jaroslav (UFM-A) RID, ORCID
Sauzay, M. (FR)Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 500, č. 1-2 (2009), s. 122-129Number of pages 8 s. Language eng - English Country CH - Switzerland Keywords extrusion ; strain localization ; persistent slip band ; vacancy Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GA101/07/1500 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000262071800017 DOI 10.1016/j.msea.2008.09.022 Annotation Cyclic strain localization into persistent slip bands produces on the surface of cyclically deformed materials persistent slip markings in the form of extrusions and intrusions. The localized cyclic plastic straining in persistent slip bands leads to the production and annihilation of dislocations as well as point defects. The effect of vacancy production and migration on the extrusion growth is treated under simplified conditions. At low temperatures when vacancies are immobile, a static extrusion is produced. At elevated temperature the diffusion equation is solved, a general expression for stabilized rate of extrusion growth is obtained and temperature dependence of the growth rate can be predicted. The predictions of the model are compared with experimental observations. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2009
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