Creep v tlaku u slitiny Al-3%Mg-0,2Sc tvářené metodou ECAP

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F06%3A00099350" target="_blank" >RIV/68081723:_____/06:00099350 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Compressive creep in Al-3%Mg-0.2%Sc alloy processed by equal-channel angular pressing

Popis výsledku v původním jazyce

An Al-3wt.%Mg-0.2wt.%Sc alloy was subjected to ECAP pressing through 8 passes via the route BC. Creep tests in compression were conducted at 473 K on ECAP billets and, for comparison purposes, on unpressed material. The present results were compared withthe results of our earlier work on creep of pure ECAP aluminium with the same imposed strain and the ECAP processing route. The results demonstrate that the creep strength of an Al-Mg-Sc alloy is significantly improved compared to that of pure Al. The higher strength observed for the pressed ternary alloy in the high-stress region results from the synergism of solid-solution strengthening and precipitate strengthening due to Al3Sc nanoscale precipitates. The presence of these precipitates dramaticallyincreases the creep resistance in the low-stress region through a threshold stress for creep. However, the creep resistance of the ECAP processed material was markedly deteriorated with respect to unpressed one.

Název v anglickém jazyce

Compressive creep in Al-3%Mg-0.2%Sc alloy processed by equal-channel angular pressing

Popis výsledku anglicky

An Al-3wt.%Mg-0.2wt.%Sc alloy was subjected to ECAP pressing through 8 passes via the route BC. Creep tests in compression were conducted at 473 K on ECAP billets and, for comparison purposes, on unpressed material. The present results were compared withthe results of our earlier work on creep of pure ECAP aluminium with the same imposed strain and the ECAP processing route. The results demonstrate that the creep strength of an Al-Mg-Sc alloy is significantly improved compared to that of pure Al. The higher strength observed for the pressed ternary alloy in the high-stress region results from the synergism of solid-solution strengthening and precipitate strengthening due to Al3Sc nanoscale precipitates. The presence of these precipitates dramaticallyincreases the creep resistance in the low-stress region through a threshold stress for creep. However, the creep resistance of the ECAP processed material was markedly deteriorated with respect to unpressed one.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/IAA2041301" target="_blank" >IAA2041301: Creepové procesy v ultrajemných kovech a slitinách připravených technikou ECAP</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název statě ve sborníku

Ultrafine grained materials IV

ISBN

978-0-87339-628-8

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

459-464

Název nakladatele

TMS

Místo vydání

Warrendale, Pennsylvania

Místo konání akce

San Antonio, Texas

Datum konání akce

12. 3. 2006

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—