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High temperature deformation mechanisms in the 14% Cr ODS alloy
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SYSNO ASEP 0479202 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High temperature deformation mechanisms in the 14% Cr ODS alloy Author(s) Šiška, Filip (UFM-A) RID, ORCID
Stratil, Luděk (UFM-A) ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Fintová, Stanislava (UFM-A) ORCID
Kuběna, Ivo (UFM-A) RID, ORCID
Záležák, Tomáš (UFM-A) RID, ORCID
Bártková, Denisa (UFM-A)Number of authors 7 Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 689, MAR (2017), s. 34-39Number of pages 6 s. Language eng - English Country CH - Switzerland Keywords ODS steel ; Plasticity ; Stress relaxation ; Dislocations Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GA14-25246S GA ČR - Czech Science Foundation (CSF) GJ15-21292Y GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 UT WOS 000397698600005 EID SCOPUS 85013167663 DOI 10.1016/j.msea.2017.02.037 Annotation The stress relaxation behavior of the ODM401 ODS steel is tested at the temperature range 400-800(circle)C in order to investigate the deformation mechanisms. The repeated relaxation tests are performed on the tensile specimens within the plastic strain range 10(-4)-10(-1). The deformation mechanisms are analyzed in terms of an activation volume, dislocation density and velocity, a thermal stress component and a strain rate hardening. The deformation is driven by the dislocation glide and climb. Dispersed particle-dislocation interactions is a dominant effect at temperatures 400-600(circle)C. Short-range interactions between dislocations and a lattice are most significant at 600(circle)C. The non-conservative motion of dislocations becomes-active at temperatures above 600(circle)C. The majority of the mobile dislocations is not trapped and is able to move freely in the microstructure. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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