Abstract
Room temperature formability testing was performed on an AlMg6.8 type alloy sheet with a fully recrystallized structure (average grain diameter ∼18 μm) and after partial annealing with a retained deformed structure. The yield strengths attained after full recrystallization and after partial annealing, were 175 and 283 MPa respectively. Such an increase in strength is followed by formability degradation, maximized around the plain strain state to either 42%, as obtained using the limiting dome height test (LDH), or 35% after using forming limit curves (FLC). A comparison with known high-strength formable alloys has shown that the tested alloy in the recrystallized condition has a better stretch formability (at the same or even higher yield stress level), while in the unrecrystallized-partially annealed condition it has a lower formability, limiting its application to moderate forming requirements for very high-strength parts. © 1998 Chapman & Hall
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. S. Hsu and D. S. Thompson, Sheet Met. Ind. 51 (1974) 772.
P. Furrer and P. M. B. Rodrigues, in Proceedings of the IV Int. Symp. on the Plasticity and Resistance to Metal Deformation, Herceg-Novi, Yugoslavia, 26–28 April 1984, edited by S. Blecic (Faculty of Metallurgy, Titograd, 1986) p. 357.
P. M. B. Rodrigues, Sheet Met. Ind. 61 (1984) 492.
Proceedings of the Light-Weight Alloys for Aerospace Applications, TMS Annual Meeting, Las Vegas, Nevada, 28 February – 2 March 1989, edited by E. W. Lee, E. H. Chia and N. J. Kim (TMS-AIME, Warrendale, 1989).
Proceedings of the Aluminium–Lithium Alloys, Design, Development and Application Update, Los Angeles CA, 25–26 March 1987, edited by R. J. Kar, S. P. Agrawal and W. E. Quist (ASM International Metals Park, OH, 1987).
E. Romhanji, V. Milenkovic and DJ. Drobnjak, Alum. 67 (1991) 1119.
T. J. Summerson and D. O. Sprowls, in Proceedings of Aluminium Alloys-Their Physical and Mechanical Properties, Charlottesville, Virginia, USA, 15–20 June 1986, edited by E. A. Starke Jr. and T. H. Sanders Jr., Vol. III (EMAS, Warley, 1986) p. 1575.
D. Ravikumar, A. Sen and K. Swaminathan, J. Mater. Sci. Lett. 13 (1994) 971.
Aluminium sheet alloys in review collection, Circle 305 in Automotive at the SAE Show, Advanced Materials & Processes 5 (1995) 22.
L. F. Mondolfo, “Aluminium alloys: structure and properties” (Butterworths, London, 1976) p. 818.
A. K. Ghosh, Metals Engng Quart. 15 (1975) 53.
S. S. Hecker, Sheet Met. Ind. 11 (1975) 671.
Idem., in Proceedings of Sheet Metal Forming and Formability, 7th Biennial congress of IDDRG 72 Amsterdam, 9–13 October 1972 (IDDRG, Amsterdam, 1972) p. 5.1.
M. PopoviĆ, Unpublished work.
R. A. Ayres, Metall.Trans. 8A (1977) 1221.
A. K. Ghosh, Trans. ASME (1977) 264.
A. Korbel, J. D. Embury, M. Hatherly, P. L. Martin and H. W. Erbsloh, Acta Metall. 34 (1986) 1999.
D. J. Lloyd, in Proceedings of Formability and Metallurgical Structure, Orlando, Florida, 5–9 October 1986, edited by A. K. Sachdev and J. D. Embury, (TMS-AMIE, Warrendale, 1987) p. 193.
R. A. Ayres, W. G. Brazier and V. F. Sajewski, J. Appl. Metalwork 1 (1979) 41.
K. Yoshida and K. Miyauchi, in Proceedings of Mechanics of Sheet Metal Forming-Material Behaviour and Deformation Analysis, Warren, Michigan, 17–18 October 1977, edited by D. P. Koistinen and cNeng-Ming Wang (Plenum Press, New York, 1978) p. 19.
E. Pink and A. Grinberg, Alum. 60 (1984) E601.
M. Y. Demeri, J. Appl. Metalwork 4 (1986) 18.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Romhanji, E., Popovic, M., Glisic, D. et al. Formability of a high-strength Al–Mg6.8 type alloy sheet. Journal of Materials Science 33, 1037–1042 (1998). https://doi.org/10.1023/A:1004328315442
Issue Date:
DOI: https://doi.org/10.1023/A:1004328315442