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Dislocation glide velocity in creep of Mg alloys derived from dip tests
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SYSNO ASEP 0328187 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dislocation glide velocity in creep of Mg alloys derived from dip tests Title Rychlost skluzu dislokací při creepu slitin Mg odvozená z techniky změn napětí Author(s) Eisenlohr, P. (DE)
Blum, W. (DE)
Milička, Karel (UFM-A)Number of authors 3 Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
510-511, Sp. Iss. (2009), s. 393-397Number of pages 5 s. Action Creep 2008 Event date 04.05.2008-09.05.2008 VEvent location Bayreuth Country DE - Germany Event type WRD Language eng - English Country CH - Switzerland Keywords Dislocation glide velocity ; Temperature dependence ; Solute drag ; Forest cutting ; Prismatic glide Subject RIV JG - Metallurgy R&D Projects GA106/06/1354 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000266397800073 DOI 10.1016/j.msea.2008.04.120 Annotation Creep generally results from a certain density of dislocations gliding at a certain velocity. In order to decouple the two quantities one needs information beyond the creep rate–stress–temperature relationship. Stress dip tests have been proposed to yield information on the athermal and the thermal components of creep stress. The athermal stress component is connected to the density of dislocations, the thermal stress component is effective in driving glide. Assuming simple relations between the stress components and the density it is possible to derive the relation between dislocation velocity and effective stress which is needed to model the creep behavior on a microstructural basis. Results in the range of 473–673 K are presented for Mg of technical purity and the Mg-alloy AS21. The dislocation velocities obtained are compared with theoretical expressions modeling either solute drag, forest cutting, or prismatic glide. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2010
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