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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy
Original language description
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
Czech name
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Czech description
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Project
<a href="/en/project/GAP108%2F11%2F2260" target="_blank" >GAP108/11/2260: The link between microstructure and creep behaviour of precipitate strengthened alloys processed by ECAP</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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