INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F10%3A00351485" target="_blank" >RIV/68081723:_____/10:00351485 - 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
INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION
Original language description
The Al powder was prepared by cold isostatic pressing at the pressure of 200 MPa. The granulometric powder fraction of a particle size less than 400 ?m was compacted via conventional direct hot-extrusion (DE) at temperature 450°C. This material was thensubjected to ECAP technique up to 4 passes. The microstructural investigations were performed using OM and SEM equipped with an EBSD unit. Creep tests in tension were conducted at temperature of 473 K and at applied stresses in the range from 30 to 60 MPa. Some creep tests in compression were performed on material just after DE. The paper presents results of study of microstructure and creep behaviour of aluminium powder before and after ECAP. It was found that ECAP method does not lead to an additionalmarked refinement of grain size. However, in dependence on number of ECAP passes ECAP method markedly influences creep behaviour due to development of high-angle grain boundaries during ECAP process.
Czech name
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Czech description
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Project
<a href="/en/project/KJB200410801" target="_blank" >KJB200410801: Study of nano-structure materials consolidated from powder compacts by ECAP technique</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
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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