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

–

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

MARTÍNEZ-DONAIRE Andrés J., PALOMO David, SÁENZ DE ARGANDOÑA Eneko, VALLELLANO Carpoforo, MENDIGUREN Joseba

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.

Keywords
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

DOI: https://doi.org/10.21741/9781644903131-174

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.

References
[1] F. Liu, Y. Li, S. Ghafoor, Z. Chen, F. Li, J. Li, Sustainability assessment of incremental sheet forming: a review, Int. J. Adv. Manuf. Tech. 119 (2022) 1385–1405. https://doi.org//10.1007/s00170-021-08368-6
[2] C. Wang, S.D.C. Walsh, Z. Weng, M.W. Haynes, D. Summerfield, A. Feitz, Green steel: synergies between the Australian iron ore industry and the production of green hydrogen, Int. J. of Hydrogen Energy 48 (2023) 32277–32293. https://doi.org//10.1016/j.ijhydene.2023.05.041
[3] H. Halim, D.S. Wilkinson, M. Niewczas, The Portevin–Le Chatelier (PLC) effect and shear band formation in an AA5754 alloy, Acta Materialia 55 (2007) 4151–4160. https://doi.org//10.1016/j.actamat.2007.03.007
[4] X. Feng, G. Fischer, R. Zielke, B. Svendsen, W. Tillmann, Investigation of PLC band nucleation in AA5754, Materials Science & Engineering A 539 (2012) 205–210. https://doi.org//10.1016/j.msea.2012.01.082
[5] Y. Hou, J. Min, J. Lin, J.E. Carsley, T.B. Stoughton, Plastic instabilities in AA5754-O under various stress states, IOP Conf. Series: Materials Science and Engineering 418 (2018) 012050. https://doi.org//10.1088/1757-899X/418/1/012050
[6] B. Reyne, P.Y. Manach, N. Moes, Macroscopic consequences of Piobert–Lüders and Portevin–Le Chatelier bands during tensile deformation in Al-Mg alloys, Materials Science & Engineering A 746 (2019) 187–196. https://doi.org//10.1016/j.msea.2019.01.009
[7] ISO 12004-2:2008, Metallic materials-sheet and strip-determination of forming limit curves, Part 2: Determination of forming limit curves in the laboratory, Switzerland, 2008.
[8] A.J. Martínez-Donaire, F.J. García-Lomas, C. Vallellano, New approaches to detect the onset of localised necking in sheets under through-thickness strain gradients, Materials & Design 57 (2014) 135-145. https://doi.org//10.1016/j.matdes.2014.01.012
[9] Q. Situ, M. Jain, D. Metzger, Determination of forming limit diagrams of sheet materials with a hybrid experimental–numerical approach, Int. J. of Mechanical Sciences 53(9) (2011) 707-719. https://doi.org//10.1016/j.ijmecsci.2011.06.003
[10] J. Min, T.B. Stoughton, J.E. Carsley, J. Lin, An improved curvature method of detecting the onset of localized necking in Marciniak tests and its extension to Nakazima tests, Int. J. of Mechanical Sciences 123 (2017) 238-252. https://doi.org//10.1016/j.ijmecsci.2017.02.011
[11] M.M. Shahzamanian, M. Parsazadeh, P.D. Wu, Numerical and analytical analyses of the formability and fracture of AA7075-O aluminum sheets in hemispherical punch tests, Int. J. of Solids and Structures 286-287 (2024) 112558. https://doi.org//10.1016/j.ijsolstr.2023.112558
[12] G. Centeno, A.J. Martínez-Donaire, D. Morales, C. Vallellano, M.B. Silva, P.A.F. Martins, Novel experimental techniques for the determination of the forming limits at necking and fracture, in: J.P. Davim (Ed.), Materials Forming and Machining, Woodhead Publishing Elsevier Ltd., 2015, pp. 1-24. https://doi.org//10.1016/B978-0-85709-483-4.00001-6