Abstract
Isothermal flow curves were determined for aluminum alloy 2024-0 at temperatures of 145 to 482 °C and at constant true-strain rates of 10-3 to 12.5 s-1 using compression tests of cylindrical specimens. The average pressure was corrected for friction and for deformation heating to determine the flow stress. At 250 °C and above, the isothermal flow curves usually exhibited a peak followed by flow softening. At 145 °C the flow curves exhibited strain hardening. For 250 °C≦ T<= 482 °C, 10-3 s-1 ≦\(\dot \varepsilon \) ≦ 12.5 s-1, and ε ≦ 0.6 the flow behavior was represented by the constitutive equation σ =K (T, ε)\(\dot \varepsilon ^{m\left( {T,\varepsilon } \right)} \) where logK andm are simple functions of temperature and strain. The as-deformed microstructures generally supported the idea that flow softening in Al 2024-0 is caused by dynamic recovery. At the higher temperatures and strain rates, however, fine recrystallized grains were observed in local areas near second phase particles and at as-annealed grain boundaries. At 482 °C, there was evidence of re-dissolution of the CuMgAl2 precipitate.
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G. D. Lahoti, S. L. Semiatin, S. I. Oh, T. Altan, and H. L. Gegel:Advanced Processing Methods for Titanium, D. F. Hasson and C. H. Hamilton, eds., TMS-AIME, 1982, pp. 23-39.
S. L. Semiatin, S. I. Oh, and T. Altan: Technical Report AFWAL-TR- 83-4109, AFWAL Materials Laboratory, WP-AFB, OH 45433, 1985.
R. Raj:Metall. Trans. A, 1981, vol. 12A, pp. 1089–97.
Y. V. R. K. Prasad, H. L. Gegel, S. M. Doraivelu, J. C. Malas, J. T. Morgan, K. A. Lark, and D. R. Barker:Metall. Trans. A, 1984, vol. 15A, pp. 1883–92.
Y. V. R. K. Prasad: private communication, AFWAL Materials Laboratory, WP-AFB, OH 45433, 1984.
P. Dadras and W. R. Wells: Trans. ASME,Journal of Engineering for Industry, 1984, vol. 106, pp. 187–95.
S. L. Semiatin and G. D. Lahoti:Metall. Trans. A, 1981, vol. 12A, pp. 1705–17.
A. T. Male and M. G. Cockcroft:J. Inst. Metals, 1964, vol. 93, pp. 38–46.
V. DePierre and A. T. Male: Technical Report AFML-TR-69-28, AFWAL Materials Laboratory, WP-AFB, OH 45433, 1969.
P. Dadras and J. F. Thomas, Jr. :Compression Testing of Homogeneous Materials and Composites, R. Chait and R. Papirno, eds., ASTM, 1983, pp. 24-39.
P. Dadras and J. F. Thomas, Jr.:Metall. Trans. A, 1981, vol. 12A, pp. 1867–76.
A. Goldsmith, T. E. Waterman, and H. J. Hirschhorn:Handbook of Thermophysical Properties of Solid Materials, MacMillan, New York, NY, 1961, vol. 2, p. 755.
W. J. McGregor Tegart:Elements of Mechanical Metallurgy, MacMillan, New York, NY, 1966, p. 43.
Y. Adda and J. Philibert:La Diffusion dans les Solides, Presses Universitaires de France, Paris, 1966, vol. II, pp. 1129 and 1149.
J. Friedel:Dislocations, Addison-Wesley, Reading, MA, 1964.
B. Escaig:Dislocation Dynamics, A. R. Rosenfield, G. T. Hahn, A. L. Bernent, and R. I. Jaffee, eds., McGraw-Hill, New York, NY, 1968, pp. 653–77.
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Formerly Visiting Associate Professor, Wright State University, Dayton, OH 45435
Formerly a Mechanical Systems Engineering Student at Wright State University
Formerly a Materials Engineering Student at Wright State University
Formerly Director, Metallurgy Program, National Science Foundation, Washington, DC
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Charpentier, P.L., Stone, B.C., Ernst, S.C. et al. Characterization and modeling of the high temperature flow behavior of aluminum alloy 2024. Metall Trans A 17, 2227–2237 (1986). https://doi.org/10.1007/BF02645920
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DOI: https://doi.org/10.1007/BF02645920