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Dynamic restoration of severely predeformed, ultrafine-grained pure Cu at 373 K observed in situ
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SYSNO ASEP 0482058 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dynamic restoration of severely predeformed, ultrafine-grained pure Cu at 373 K observed in situ Author(s) Král, Petr (UFM-A) RID, ORCID
Blum, W. (DE)
Dvořák, Jiří (UFM-A) RID, ORCID
Eisenlohr, P. (US)
Petrenec, M. (CZ)
Sklenička, Václav (UFM-A) RID, ORCIDNumber of authors 6 Source Title Materials Characterization. - : Elsevier - ISSN 1044-5803
Roč. 134, DEC (2017), s. 329-334Number of pages 6 s. Language eng - English Country US - United States Keywords ECAP ; Dynamic grain coarsening ; UFG copper ; In situ Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000419416400038 EID SCOPUS 85033410442 DOI 10.1016/j.matchar.2017.11.006 Annotation Microstructure changes of ultrafine-grained pure copper prepared by equal-channel angular pressing were investigated during in situ tensile testing inside a scanning electron microscope at constant total strain rate of 10-4 s-1 at 373 K (~ 0.28 Tm). After fast work hardening the flow stress saturated at an inelastic strain of 0.06. Significant local coarsening of grains was observed to start at about 2/3 of the maximum flow stress. However, these localized events did not significantly change the mean grain size up to an inelastic strain of 0.09. Surface observations showed that the coarsening was preferentially located at shear bands. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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