Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F11%3A00367034" target="_blank" >RIV/68081723:_____/11:00367034 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy

Popis výsledku v původním jazyce

Equal-channel angular pressing (ECAP) was conducted at room temperature and extrusion passes were processed by route Bc up to 12 passes. Tensile creep tests were performed at 473 K, 573 K and 673 K at different constant applied stresses. It was observedthat the original coarse grain size of unprocessed alloy was reduced to 0.3 ?m after 8 ECAP passes and the grain growth during creep was restricted by precipitates with the mean diameter 4.0 nm. No significant effect on creep resistance was found after one ECAP pass at 473 and 573 K. However, the longest time to fracture was exhibited by alloy after 2 ECAP passes at 573 and 673 K but with further increasing number of ECAP passes a decrease in the time to fracture was observed. Nevertheless, the beneficial effect of ECAP on creep resistance was still documented after 8 passes for temperatures of 473 and 573 K. By contrast, creep tests performed at 673 K showed that the time to fracture of UFG material is shorter as compared with that for

Název v anglickém jazyce

Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy

Popis výsledku anglicky

Equal-channel angular pressing (ECAP) was conducted at room temperature and extrusion passes were processed by route Bc up to 12 passes. Tensile creep tests were performed at 473 K, 573 K and 673 K at different constant applied stresses. It was observedthat the original coarse grain size of unprocessed alloy was reduced to 0.3 ?m after 8 ECAP passes and the grain growth during creep was restricted by precipitates with the mean diameter 4.0 nm. No significant effect on creep resistance was found after one ECAP pass at 473 and 573 K. However, the longest time to fracture was exhibited by alloy after 2 ECAP passes at 573 and 673 K but with further increasing number of ECAP passes a decrease in the time to fracture was observed. Nevertheless, the beneficial effect of ECAP on creep resistance was still documented after 8 passes for temperatures of 473 and 573 K. By contrast, creep tests performed at 673 K showed that the time to fracture of UFG material is shorter as compared with that for

Druh

O - Ostatní výsledky

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F11%2F2260" target="_blank" >GAP108/11/2260: Vztah mezi mikrostrukturou a creepovým chováním precipitačně zpevněných slitin připravených metodou ECAP</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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