Number of the records: 1
About the activation volume for cross-slip in Cu at high stresses
- 1.
SYSNO ASEP 0359218 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title About the activation volume for cross-slip in Cu at high stresses Author(s) Couteau, O. (CH)
Kruml, Tomáš (UFM-A) RID, ORCID
Martin, J. L. (CH)Number of authors 3 Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 59, 10 (2011), s. 4207-4215Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords Cross-slip ; Thermally activated processes ; Stress relaxation technique Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000291119700041 DOI 10.1016/j.actamat.2011.03.045 Annotation The experiment performed by Bonneville and Escaig, designed for the direct measurement of the activation parameters of cross-slip, has been repeated. A denser initial dislocation forest density is obtained with a higher predeformation stress compared with a previous study. The minimum activation volume at yield is 124b3 when cross-slip is dominant at 24 K, instead of 280b3 as proposed formerly. Consequently, the activation energy at zero stress is in the range of 0.61 eV, lower than in the previous study. The results are discussed in terms of predictions of linear elasticity models and those from recent atomistic simulations. To understand the discrepancies between the experimental and simulation results the Bonneville–Escaig method, as well as the simulation conditions, require further assessment. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
Number of the records: 1