Abstract
A modified AA5083 aluminum sheet material containing a Cu addition of 0.61 wt pct has been investigated under conditions relevant to commercial hot-forming technologies. This material was produced by continuous casting followed by industrial hot and cold rolling into sheet. Deformation and failure mechanisms at elevated temperatures were investigated through mechanical testing, thermal analysis, and microscopy. The effects of Cu addition are evaluated by comparisons with data from AA5083 sheet materials without Cu addition, produced both by continuous and direct-chill (DC) casting techniques. At low temperatures and fast strain rates, for which solute-drag (SD) creep governs deformation, the Cu addition slightly increases tensile ductility at 450 °C but does not otherwise alter deformation behaviors. At high temperatures and slow strain rates, for which grainboundary-sliding (GBS) creep governs deformation, the Cu addition decreases flow stress and, at 450 °C, improves tensile ductility. A strong temperature dependence for tensile ductility results from the Cu addition; tensile ductility at 500 °C is notably reduced from that at 450 °C. The Cu addition creates platelike particles at grain boundaries, which produce incipient melting and the observed mechanical behavior.
Similar content being viewed by others
References
F.J. Humphreys:Acta Metall., 1977, vol. 25, pp. 1323–44.
F.J. Humphreys:Met. Sci., 1979, vol. 13, pp. 136–45.
D. Doherty, D.A. Hughes, F.J. Humphreys, J.J. Jonas, D. Juul Jensen, M.E. Kassner, W.E. King, T.R. McNelley, H.J. McQueen, and A.D. Rollett:Mater. Sci. Eng., 1997, vol. A238, pp. 219–74.
M.-A. Kulas, W.P. Green, E.M. Taleff, P.E. Krajewski, and T.R. McNelley:Metall. Mater. Trans. A, 2005, vol. 36A, pp. 1249–61.
M.-A. Kulas, W.P. Green, E.C. Pettengill, P.E. Krajewski, and E.M. Taleff: inAdvances in Superplasticity and Superplastic Forming, E.M. Taleff, P.A. Friedman, P.E. Krajewski, R.S. Mishra, and J.G. Schroth, eds., TMS, Warrendale, PA, 2004, pp. 127–38.
M.-A. Kulas, W.P. Green, E.M. Taleff, P.E. Krajewski, and T.R. McNelley:Metall. Mater. Trans. A, 2005, vol. 36A, pp. 645–55.
D.H. Bae and A.K. Ghosh:Acta Mater., 2002, vol. 50, pp. 511–23.
D.H. Bae, A.K. Ghosh, and J.R. Bradley:Metall. Mater. Trans. A, 2003, vol. 34A, pp. 2449–63.
E.M. Taleff, P.J. Nevland, and P.E. Krajewski:Metall. Mater. Trans. A, 2001, vol. 32A, pp. 1119–30.
J.G. Schroth: inAdvances in Superplasticity and Superplastic Forming, E.M. Taleff, P.A. Friedman, P.E. Krajewski, R.S. Mishra, and J.G. Schroth, eds., TMS, Warrendale, PA, 2004, pp. 9–20.
H. Watanabe, K. Ohori, and Y. Takeuchi:Trans. Iron Steel Inst. Jpn., 1987, vol. 27, pp. 730–3.
M.J. Starink:Int. Mater. Rev. 2004, vol. 49, pp. 191–226.
“Standard Test Methods for Determining Average Grain Size.”ASTM Standard Designation E 112-96, ASTM, West Conshohocken, PA, 1996.
http://rsb.info.nih.gov/ij/
W. Köster:Z. Metallkd., 1948, vol. 39, pp. 1–9.
W. Köster:Z. Metallkd., 1948, vol. 39, pp. 9–12.
K. Abe, Y. Tanji, H. Yoshinaga, and S. Morozumi:J. Jpn. Inst. Light Met., 1977, vol. 27, pp. 279–81.
O.D. Sherby and J. Wadsworth:Progr. Mater. Sci., 1989, vol. 33, pp. 169–221.
E.M. Taleff: inAdvances in Superplasticity and Superplastic Forming, E.M. Taleff, P.A. Friedman, P.E. Krajewski, R.S. Mishra, and J.G. Schroth, eds., TMS, Warrendale, PA, 2004, pp. 85–94.
R. Lagnborg and B. Bergman:Met. Sci., 1976, vol. 10, pp. 20–28.
J. Weertman:J. Appl. Phys., 1957, vol. 28, pp. 1185–89.
J. Weertman:Trans. TMS-AIME, 1960, vol. 218, pp. 207–18.
O.D. Sherby and P.M. Burke:Progr. Mater. Sci., 1968, vol. 13, pp. 325–90.
E.M. Taleff, W.P. Green, M.-A. Kulas, T.R. McNelley, and P.E. Krajewski:Mater. Sci. Eng., 2005, vol. 36, pp. 1249–61.
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J.R. David, ed., ASM INTERNATIONAL, Metals Park, OH, 1993, pp. 675–76.
Metals Handbook, 8th ed., T. Lyman, ed., ASM, Metals Park, OH, 1973, vol. 8, p. 386.
L.F. Mondolfo:Aluminum Alloys: Structure and Properties, Butterworth and Co., London, 1976, pp. 497–505.
V. Radmilovic, R. Kilaas, U. Dahmen, and G.J. Shiflet:Acta Mater., 1999, vol. 47, pp. 3987–97.
L. Kovarik, P.I. Gouma, C. Kisielowski, S.A. Court, and M.J. Mills:Acta Mater., 2004, vol. 52, pp. 2509–20.
Metals Handbook, 8th ed., T. Lyman, ed., ASM, Metals Park, OH, 1973, vol. 8, p. 294.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Green, W.P., Kulas, MA., Niazi, A. et al. Deformation and failure of a superplastic AA5083 aluminum material with a cu addition. Metall Mater Trans A 37, 2727–2738 (2006). https://doi.org/10.1007/BF02586106
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02586106