Effect of reduction ratio in flow forming process on microstructure and mechanical properties of a 6082 Al alloy
MUTLU Mehmet, ÖZSOY Atasan, FENERCIOĞLU Tevfik Ozan, KARAKAŞ Aptullah, BAYDOĞAN Muratdownload PDF
Abstract. Flow forming is a cold deformation process in which hollow cylindrical or conical parts with different geometric configurations are produced using tools such as balls, rollers, or flow forming wheels on specialized mandrels. Because it enables the production of parts without any further modifications or with minimal modifications before their use in service, the process is categorized as an NSF technology (net-shape forming), and therefore the flow formed parts can be considered as a final product. The aim of this study is to investigate the microstructure and mechanical properties of a flow formed 6082 Al alloy, which was initially in W-temper condition. Hollow cylindrical preforms were first manufactured by machining, and subsequently solution heat treated and quenched. Then, the parts were flow formed with 3 different reduction ratios (45%, 55% and 65%) prior to aging at 177 °C for 8 h to achieve T8 temper condition. Microstructures of the flow formed parts were examined by an optical microscope, and hardness and tensile tests were conducted. The results revealed that increasing reduction ratio slightly decreases hardness and strength with almost constant ductility.
6082 Al Alloy, Age Hardening, Flow Forming, Strain Hardening
Published online 4/19/2023, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: MUTLU Mehmet, ÖZSOY Atasan, FENERCIOĞLU Tevfik Ozan, KARAKAŞ Aptullah, BAYDOĞAN Murat, Effect of reduction ratio in flow forming process on microstructure and mechanical properties of a 6082 Al alloy, Materials Research Proceedings, Vol. 28, pp 1015-1020, 2023
The article was published as article 111 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.
 M. Kolar, K.O Pedersen, , S. Gulbrandsen-Dahl, K. Marthinsen, Combined effect of deformation and artificial aging on mechanical properties of Al–Mg–Si Alloy, Transactions of Nonferrous Metals Society of China 22 (2012) 1824-1830, https://doi.org/10.1016/S1003-6326(11)61393-9
 Karakaş, T.O. Fenercioğlu, T. Yalçınkaya, The influence of flow forming on the precipitation characteristics of Al2024 alloys, Mater. Lett. 299 (2021) 130066. https://doi.org/10.1016/j.matlet.2021.130066
 Standard Practice for Heat Treatment of Wrought Aluminum Alloys, ASTM B918/B918M-20a, January 2022.
 T.N. De, B. Podder, N.B. Hui, C. Mondal, Experimental study and analysis of surface roughness of the flow formed H30 alloy tubes, Materials Today: Proceedings 38 (2021) 3190-3197. https://doi.org/10.1016/j.matpr.2020.09.647
 D. Tsivoulas, J. Quinta da Fonseca, M. Tuffs, M. Preuss, Effects of flow forming parameters on the development of residual stresses in Cr–Mo–V steel tubes, Mater. Sci. Eng. A 624 (2015) 193–202. https://doi.org/10.1016/j.msea.2014.11.068
 A.K. Srivastwa, P.K. Singh, S. KumarExperimental investigation of flow forming forces in Al7075 and Al2014 – A comparative study, Materials Today: Proceedings 47 (2021) 2715-2719. https://doi.org/10.1016/j.matpr.2021.02.781
 M. Haghshenas, J.T. Wood, R.J. Klassen, Investigation of strain-hardening rate on splined mandrel flow forming of 5052 and 6061 aluminum alloys, Mater. Sci. Eng. A 532 (2012) 287- 294. https://doi.org/10.1016/j.msea.2011.10.094
 P.F. Gao, Z.P. Ren, M. Zhan, L. Xing, Tailoring of the microstructure and mechanical properties of the flow formed aluminum alloy sheet, J. Alloy. Compd. 928 (2022) 167139. https://doi.org/10.1016/j.jallcom.2022.167139
 J. Friis, B. Holmedal, Ø. Ryen, E. Nes, O.R. Myhr, Ø. Grong, T. Furu, K. Marthinsen, Work Hardening Behaviour of Heat-Treatable Al-Mg-Si-Alloys, Mater. Sci. Forum 519–521 (2006) 1901–1906. https://doi.org/10.4028/www.scientific.net/msf.519-521.1901
 Standard Guide for Preparation of Metallographic Specimens, ASTM E3-11, June 12, 2017.
 Standard Test Method for Microindentation Hardness of Materials, ASTM E384-17, June 1, 2017.
 Standard Test Methods for Tension Testing of Metallic Materials, ASTM E8/E8M-22, July 19, 2022.
 J.D. Verhoeven, Fundamentals of Physical Metallurgy, First ed., Wiley, Michigan, 1975. ISBN 0471906166.