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TECHNICAL PAPERS

A Constitutive Description of Aluminum-1% Magnesium Alloy Deformed Under Hot-Working Conditions

[+] Author and Article Information
E. S. Puchi Cabrera

School of Metallurgical Engineering and Materials Science, Faculty of Engineering, Universidad Central de Venezuela, Apartado postal 47885, Los Chaguaramos, Caracas 1045, Venezuela

J. Eng. Mater. Technol 123(3), 301-308 (Feb 05, 2001) (8 pages) doi:10.1115/1.1370374 History: Received January 03, 2000; Revised February 05, 2001
Copyright © 2001 by ASME
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References

Chandra, T., and Sakai, T. (Eds.), 1997, Thermec’97, Proc. Internat. Conf. On Thermomechanical Processing of Steels and Other Materials, The Minerals, Metals and Materials Society, Warrendale, PA.
Sato, T., et al. (Eds.), 1998, Proc. VI Internat. Conf. On Aluminum Alloys, Toyohashi, Japan, The Japan Institute of light Metals.
Shen, S. and Dawson, P. R. (Eds.), 1995, Simulation of Materials Processing: Theory, Methods and Applications, A. A. Balkema, Rotterdam, Brookfield.
Gelin, J. C., Ghouati, O., and Shahani R., 1993, “Identification and Modeling of Constitutive Equations for Hot Rolling of Aluminum Alloys From Plane Strain Compression Testing,” Proc. 1st Internat. Conf. on Modeling of Metal Rolling Processes, J. Beynon, ed., The Institute of Materials, U.K., p. 239.
Shi,  H., McLaren,  A. J., Sellars,  C. M., Shahani,  R., and Bolingbroke,  R., 1997, “Constitutive Equations for High Temperature Flow Stress of Aluminum Alloys,” Mater. Sci. Technol., 13, p. 210.
Sah,  J. P., Richardson,  G., and Sellars,  C. M., 1969, “Recrystallization During Hot Deformation of Nickel,” J. Aust. Inst. Met., 14, p. 292.
Sellars,  C. M., and Tegart,  W. J. McG., 1972, “La Relation Entre La Résistance et la Structure Dans la Déformation a Chaud,” Mém. Sci. Met., 23, p. 731
Puchi, E. S., McLaren, A. J., and Sellars C. M., 1995, “Stress-Strain Behavior of Commercial Aluminum Alloys Under Hot-Working Conditions,” Simulation of Materials Processing: Theory, Methods and Applications, S. F. Shen and P. Dawson, eds., A. A. Balkema, Rotterdam, p. 321.
Puchi,  E. S., Staia,  M. H., and Villalobos,  C., 1997, “On the Mechanical Behavior of Commercial-Purity Aluminum Deformed Under Axisymmetric Compression Conditions,” Int. J. Plast., 13, No. 8–9, pp. 723–742.
Kocks,  U. F., 1976, “Laws For Work-Hardening and Low Temperature Creep,” ASME J. Eng. Mater. Technol., 98, p. 76.
Follansbee,  P. S., and Kocks,  U. F., 1988, “A Constitutive Description of the Deformation of Copper Based on the Use of the Mechanical Threshold Stress as an Internal Variable,” Acta Metall., 36, No. 1, p. 81.
Voce,  E., 1948, “The Relationship Between Stress and Strain for Homogeneous Deformation,” J. Inst. Met., 74, p. 537.
Voce,  E., 1955, “A Practical Strain Hardening Function,” Metallurgia, 51, p. 219.
Estrin,  Y., and Mecking,  H., 1984, “A Unified Phenomenological Description of Work Hardening and Creep Base on One Parameter Models,” Acta Metall., 32, No. 1, p. 57.

Figures

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Stress-strain curves of Al-1% Mg alloy deformed at 578 K, at different strain rates
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Stress-strain curves of Al-1% Mg alloy deformed at 658 K, at different strain rates
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Stress-strain curves of Al-1% Mg alloy deformed at 728 K, at different strain rates
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Normalized work-hardening rate versus normalized stress at 578 K and different strain rates
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Normalized work-hardening rate versus normalized stress at 658 K and different strain rates
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Normalized work-hardening rate versus normalized stress at 728 K and different strain rates
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Change of the normalized stress parameters σ0 and σss with ln U
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Comparison of the computed values of the initial flow stress with those determined from the optimization of the experimental flow stress curves
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Comparison of the computed values of the saturation stress with those determined from the optimization of the experimental flow stress curves
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Change in the normalized initial work-hardening rate with the effective strain rate
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Comparison of the optimized stress-strain curves at 578 K and different strain rates, with those predicted by the constitutive model advanced here
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Comparison of the optimized stress-strain curves at 658 K and different strain rates, with those predicted by the constitutive model advanced here
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Comparison of the optimized stress-strain curves at 728 K and different strain rates, with those predicted by the constitutive model advanced here
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General comparison of the experimental values of the flow stress determined under different deformation conditions, with those predicted by the constitutive model proposed

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