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Occurrence of the Portevin Le-Chatelier effect in open-cell microcellular Al-2 wt% Mg

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    SYSNO ASEP0509298
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleOccurrence of the Portevin Le-Chatelier effect in open-cell microcellular Al-2 wt% Mg
    Author(s) Knapek, M. (CZ)
    Dobroň, P. (CZ)
    Máthis, K. (CZ)
    Illková, Ksenia (UFP-V)
    Mortensen, A. (CH)
    Chmelík, F. (CZ)
    Number of authors6
    Source TitleScripta Materialia. - : Elsevier - ISSN 1359-6462
    Roč. 132, April (2017), s. 13-16
    Number of pages4 s.
    Languageeng - English
    CountryUS - United States
    Keywordsflow ; Portevin Le-Chatelier effect ; Metal foams ; Strain rate sensitivity ; Acoustic methods ; Plastic deformation
    Subject RIVJG - Metallurgy
    OECD categoryMaterials engineering
    Method of publishingLimited access
    Institutional supportUFP-V - RVO:61389021
    UT WOS000397359100004
    EID SCOPUS85010789735
    DOI10.1016/j.scriptamat.2017.01.020
    AnnotationMicrocellular open-cell metal foams with pores of 75 or 400 pm in diameter and made of pure Al or Al-2 wt% Mg are tested in compression. The aluminum foam exhibits a typical smooth plastic flow and a positive strain rate sensitivity, whereas plastic instabilities and a negative strain rate sensitivity appear in the stress-strain curves of the Al-2 wt Mg foams, indicating the presence of the Portevin Le-Chatelier (PLC) effect. The effect is further confirmed by acoustic emission analysis.Taken together, the data indicate that the PLC effect is caused in this material by the sudden collective deformation of many struts across the material. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
    WorkplaceInstitute of Plasma Physics
    ContactVladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
    Year of Publishing2020
    Electronic addresshttps://www.sciencedirect.com/science/article/pii/S1359646217300301?via%3Dihub
Number of the records: 1