Microstructural evolution and mechanical properties of high purity aluminium processed by equal-channel angular pressing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F08%3A00377776" target="_blank" >RIV/68081723:_____/08:00377776 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.2320/matertrans.ME200719" target="_blank" >http://dx.doi.org/10.2320/matertrans.ME200719</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2320/matertrans.ME200719" target="_blank" >10.2320/matertrans.ME200719</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural evolution and mechanical properties of high purity aluminium processed by equal-channel angular pressing

Popis výsledku v původním jazyce

High purity (99.999%) Al was subjected to ECAP for up to 8 passes through route BC. Hardness measurements and tensile tests were conducted at room temperature with respect to the number of ECAP passes. It is shown that the hardness and the tensile strength increased to take a maximum at 2 passes. However, unusual behaviour was observed such that further straining by ECAP for more than 2 passes decreased the hardness and tensile strength. Microstructural observation revealed that straining by ECAP for 2passes led to the development of a subgrain structure having dislocations within some subgrains and tangled dislocations near subgrain boundaries. After 8 passes, the grains became larger and the grain boundaries sharpened and clearly defined. It is considered that the high dislocation mobility arising from high stacking fault energy and very low level of impurities were responsible for the unusual tensile behaviour and the difficulty in reducing the grain size.

Název v anglickém jazyce

Microstructural evolution and mechanical properties of high purity aluminium processed by equal-channel angular pressing

Popis výsledku anglicky

High purity (99.999%) Al was subjected to ECAP for up to 8 passes through route BC. Hardness measurements and tensile tests were conducted at room temperature with respect to the number of ECAP passes. It is shown that the hardness and the tensile strength increased to take a maximum at 2 passes. However, unusual behaviour was observed such that further straining by ECAP for more than 2 passes decreased the hardness and tensile strength. Microstructural observation revealed that straining by ECAP for 2passes led to the development of a subgrain structure having dislocations within some subgrains and tangled dislocations near subgrain boundaries. After 8 passes, the grains became larger and the grain boundaries sharpened and clearly defined. It is considered that the high dislocation mobility arising from high stacking fault energy and very low level of impurities were responsible for the unusual tensile behaviour and the difficulty in reducing the grain size.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Materials Transactions

ISSN

1345-9678

e-ISSN

—

Svazek periodika

49

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

5

Strana od-do

15-19

Kód UT WoS článku

000253442100004

EID výsledku v databázi Scopus

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