Počet záznamů: 1
In situ study of microstructure and strength of severely predeformed pure Cu in deformation at 573 K
- 1.
SYSNO ASEP 0450747 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název In situ study of microstructure and strength of severely predeformed pure Cu in deformation at 573 K Tvůrce(i) Blum, W. (DE)
Dvořák, Jiří (UFM-A) RID, ORCID
Král, Petr (UFM-A) RID, ORCID
Petrenec, M. (CZ)
Eisenlohr, P. (US)
Sklenička, Václav (UFM-A) RID, ORCIDCelkový počet autorů 6 Zdroj.dok. Philosophical Magazine. - : Taylor & Francis - ISSN 1478-6435
Roč. 95, č. 33 (2015), s. 3696-3711Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova ECAP ; dynamic recovery ; static recrystallization ; dynamic recrystallization ; grains ; in situ observation ; strength ; stress relaxation Vědní obor RIV JJ - Ostatní materiály CEP GAP108/11/2260 GA ČR - Grantová agentura ČR ED1.1.00/02.0068 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFM-A - RVO:68081723 UT WOS 000364335800001 EID SCOPUS 84947037459 DOI 10.1080/14786435.2015.1096025 Anotace The influence of grain refinement on the strength of pure Cu at the elevated temperature of 573K was studied in situ in a SEM. Thermomechanical processing by eight passes of equal channel angular pressing at ambient temperature and annealing at test temperature generates grains of 3 μm size. During deformation in the SEM, further grain coarsening occurs by discontinuous recrystallization in subsequent waves causing oscillations of flow stress. Cracks start to form at the boundaries, but partly become intragranular when boundaries move away. The relaxation of flow stress in the periods, where the imposed elongation was interrupted, yields information about the deformation kinetics. Two mechanisms are identified. One is thermally activated glide related with defect generation. The second one accompanies the processes of microstructure restoration. Under the present deformation conditions the grain coarsening by DRX does not soften the material, but leads to slight hardening as high-angle boundaries are exchanged for low-angle boundaries. This is discussed in terms of boundary-mediated processes. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2016
Počet záznamů: 1