Thermal stability of severely deformed AlMg3 sheets
The result's identifiers
Result code in 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>
Alternative codes found
RIV/61989100:27360/20:10245730
Result on the web
<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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Alternative languages
Result language
angličtina
Original language name
Thermal stability of severely deformed AlMg3 sheets
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20300 - Mechanical engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
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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Number of pages
6
Pages from-to
344-349
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 20, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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