Necking detection in stretch-bent materials exhibiting the Portevin-Le Chatelier effect

Necking detection in stretch-bent materials exhibiting the Portevin-Le Chatelier effect


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Abstract. In recent years, there has been increasing societal awareness of the carbon dioxide (CO2) footprint resulting from individual actions and lifestyles. One of the research actions is focused on the development of eco-friendly alloys with more recycled scrap material in order to reduce emissions, but this can also result in greater variability of material properties. In this context, accurately characterizing the formability limits of materials is of paramount importance for optimizing manufacturing processes. Although ISO 12004-2:2008 standard is commonly used for necking detection, recent years have seen time-dependent methods yield more accurate predictions. Nevertheless, in materials exhibiting the Portevin-Le Chatelier (PLC) effect, such as some common lightweight alloys used in automotive and aeronautics, necking detection introduces significant challenges, and even more so when the material is subjected to severe local stretch-bending states. In this work, various necking detection techniques were employed to analyze their capabilities in a series of stretch-bending experiments over a 2.94 mm thick AA5754H11 PLC-driven material.

Necking, Nakazima, PLC Effect, Stretch-Bending, Time-Dependent, Flat Valley Method

Published online 4/24/2024, 10 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: MARTÍNEZ-DONAIRE Andrés J., PALOMO David, SÁENZ DE ARGANDOÑA Eneko, VALLELLANO Carpoforo, MENDIGUREN Joseba, Necking detection in stretch-bent materials exhibiting the Portevin-Le Chatelier effect, Materials Research Proceedings, Vol. 41, pp 1569-1578, 2024


The article was published as article 174 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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