In situ study of microstructure and strength of severely predeformed pure Cu in deformation at 573 K

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00450747" target="_blank" >RIV/68081723:_____/15:00450747 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1080/14786435.2015.1096025" target="_blank" >http://dx.doi.org/10.1080/14786435.2015.1096025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/14786435.2015.1096025" target="_blank" >10.1080/14786435.2015.1096025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

In situ study of microstructure and strength of severely predeformed pure Cu in deformation at 573 K

Popis výsledku v původním jazyce

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 ?m 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 relatedwith 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

Název v anglickém jazyce

In situ study of microstructure and strength of severely predeformed pure Cu in deformation at 573 K

Popis výsledku anglicky

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 ?m 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 relatedwith 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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Philosophical Magazine

ISSN

1478-6435

e-ISSN

—

Svazek periodika

95

Číslo periodika v rámci svazku

33

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

3696-3711

Kód UT WoS článku

000364335800001

EID výsledku v databázi Scopus

2-s2.0-84947037459