Creep in copper processed by equal-channel angular pressing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F09%3A00332614" target="_blank" >RIV/68081723:_____/09:00332614 - isvavai.cz</a>
Alternative codes found
RIV/67985840:_____/09:00332614
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Creep in copper processed by equal-channel angular pressing
Original language description
This paper examines the effect of equal-channel angular pressing (ECAP) on creep behaviour of pure copper.The experiments showed that ECAP has reduced the average grain size to 400 nm.It was found that ECAP passes have resulted in enhancement of creep life in comparison with the initial unpressed state of material. The pressed material exhibits the highest creep resistance after the first ECAP pass. However, successive ECAP passes lead to a noticeable decrease in the creep properties.The activation energy of creep and the stress exponent of the minimum creep rate were determined. It was found that a change in the value of the stress exponent of the minimum creep rate n occurs after 4 ECAP passes which can be explained by the transformation of microstructure from coarse-grained state to ultrafine-grained one. The detailed analysis suggests that creep occurs in the pressed specimens through a conventional intragranular process involving the glide and climb of dislocations.
Czech name
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Czech description
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Project
<a href="/en/project/IAA2041301" target="_blank" >IAA2041301: Creep processes in ultrafine-grained metals and alloys processed by the ECAP</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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