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Occurrence of the Portevin Le-Chatelier effect in open-cell microcellular Al-2 wt% Mg
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SYSNO ASEP 0509298 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Occurrence 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 authors 6 Source Title Scripta Materialia. - : Elsevier - ISSN 1359-6462
Roč. 132, April (2017), s. 13-16Number of pages 4 s. Language eng - English Country US - United States Keywords flow ; Portevin Le-Chatelier effect ; Metal foams ; Strain rate sensitivity ; Acoustic methods ; Plastic deformation Subject RIV JG - Metallurgy OECD category Materials engineering Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000397359100004 EID SCOPUS 85010789735 DOI 10.1016/j.scriptamat.2017.01.020 Annotation Microcellular 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. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2020 Electronic address https://www.sciencedirect.com/science/article/pii/S1359646217300301?via%3Dihub
Number of the records: 1