Thermal stability of severely deformed AlMg3 sheets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F20%3A10245730" target="_blank" >RIV/61989100:27230/20:10245730 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/20:10245730

Výsledek na webu

<a href="https://www.confer.cz/metal/2020/3491-thermal-stability-of-severely-deformed-almg3-sheets" target="_blank" >https://www.confer.cz/metal/2020/3491-thermal-stability-of-severely-deformed-almg3-sheets</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thermal stability of severely deformed AlMg3 sheets

Popis výsledku v původním jazyce

In this article a continuous severe plastic deformation (SPD) process entitled dual rolls equal channel extrusion (DRECE) for producing ultrafine-grained (UFG) microstructure of thin sheets is presented. The DRECE process combines conventional equal channel angular pressing (ECAP) process and continual CONFORM process, and it can be easily scaled for industrial use. Keeping constant both the cross section and the length of the severely deformed strip of sheet, the DRECE method promotes a refinement of the microstructure. The effect of post SPD annealing at different temperatures (150 oC, 180 oC, 200 oC, 250 oC, 300 oC and 350 oC) for 30 minutes on the stability of severely deformed microstructure of investigated AlMg3 aluminium alloy. The initial grain size was ~ 7.9 μm and was reduced to 6.8 μm with maximum density of dislocation after 6 passes at room temperature, which were accompanied by the formation that is typical for low strain structures. The annealing treatment at temperatures lower than 180oC did n ot affe cted the microstructure significantly. A continuous grain growth occurred at higher temperatures (180oC-300oC) due to the continuous recrystallization. A bimodal microstructure having a bimodal dislocation density distribution was obtained through the discontinuous recrystallization at 350oC. The annealing led to some sort of bimodal grain mixture with the larger grains embedded in the severely deformed structure that provide and excellent combination of strength and ductility. Therefore, the DRECE process could be a promising industrial SPD method to continuously produce advanced construction materials with the advantages of energy and cost saving and high process efficiency.

Název v anglickém jazyce

Thermal stability of severely deformed AlMg3 sheets

Popis výsledku anglicky

In this article a continuous severe plastic deformation (SPD) process entitled dual rolls equal channel extrusion (DRECE) for producing ultrafine-grained (UFG) microstructure of thin sheets is presented. The DRECE process combines conventional equal channel angular pressing (ECAP) process and continual CONFORM process, and it can be easily scaled for industrial use. Keeping constant both the cross section and the length of the severely deformed strip of sheet, the DRECE method promotes a refinement of the microstructure. The effect of post SPD annealing at different temperatures (150 oC, 180 oC, 200 oC, 250 oC, 300 oC and 350 oC) for 30 minutes on the stability of severely deformed microstructure of investigated AlMg3 aluminium alloy. The initial grain size was ~ 7.9 μm and was reduced to 6.8 μm with maximum density of dislocation after 6 passes at room temperature, which were accompanied by the formation that is typical for low strain structures. The annealing treatment at temperatures lower than 180oC did n ot affe cted the microstructure significantly. A continuous grain growth occurred at higher temperatures (180oC-300oC) due to the continuous recrystallization. A bimodal microstructure having a bimodal dislocation density distribution was obtained through the discontinuous recrystallization at 350oC. The annealing led to some sort of bimodal grain mixture with the larger grains embedded in the severely deformed structure that provide and excellent combination of strength and ductility. Therefore, the DRECE process could be a promising industrial SPD method to continuously produce advanced construction materials with the advantages of energy and cost saving and high process efficiency.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20300 - Mechanical engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2020 : 29th International Conference on Metallurgy and Materials : conference proceedings : May 20-22, 2020, Brno, Czech Republic, EU

ISBN

978-80-87294-97-0

ISSN

2694-9296

e-ISSN

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Počet stran výsledku

6

Strana od-do

344-349

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

20. 5. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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