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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

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

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20300 - Mechanical engineering

Result continuities

  • Project

  • 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

  • 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