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TECHNICAL PAPERS

On the Mechanical Threshold Stress of Aluminum: Effect of the Alloying Content

[+] Author and Article Information
Eli S. Puchi-Cabrera, Crisanto Villalobos-Gutiérrez, Gonzalo Castro-Fariñas

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

J. Eng. Mater. Technol 123(2), 155-161 (Jan 09, 2001) (7 pages) doi:10.1115/1.1354990 History: Received December 06, 1999; Revised January 09, 2001
Copyright © 2001 by ASME
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References

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 State Variable,” Acta Metall., 36, pp. 81–93.
Follansbee,  P. S., and Gray,  G. T., 1989, “An Analysis of the Low Temperature, Low and High Strain Rate Deformation of Ti-&Al-4V,” Metall. Trans., 20A, pp. 863–874.
Puchi,  E. S., and Staia,  M. H., 1995, “Mechanical Behavior of Aluminum Deformed Under Hot-Working Conditions,” Metall. Mater. Trans. A, 26A, pp. 2895–2910.
Puchi,  E. S., Staia,  M. H., and Villalobos,  C., 1997, “On the Mechanical Behavior of Aluminum Deformed Under Axisymmetric Compression Conditions,” Int. J. Plast., 13, pp. 723–742.
Puchi,  E. S., and Staia,  M. H., 1998, “High-Temperature Deformation of Commercial-Purity Aluminum,” Metall. Mater. Trans. A, 29A, pp. 2345–2359.
Hot Working Guide: A Compendium of Processing Maps, 1997, Y. V. R. K. Prasad and S. Sasidhara, eds., ASM International, The Materials Information Society, Materials Park, OH.
Kocks,  U. F., 1976, “Laws for Work-Hardening and Low-Temperature Creep,” ASME J. Eng. Mater. Technol., 98, pp. 76–85.
Mecking,  H., and Kocks,  U. F., 1981, “Kinetics of Flow and Strain-Hardening,” Acta Metall., 29, pp. 1865–1875.

Figures

Grahic Jump Location
Variation of the current saturation stress with temperature and strain rate for Al-99.999 percent, Al-0.1 percent Mg and Al-Fe. The solid line shows the fit of Eq. (6) to the extrapolated values of the saturation stress.
Grahic Jump Location
Variation of the current saturation stress with temperature and strain rate for Al-99.995 percent, Al-0.5 percent Mg and Al-1 percent Mg. The solid line shows the fit of Eq. (6) to the extrapolated values of the saturation stress.
Grahic Jump Location
Comparison between the experimental and calculated values of the flow stress for aluminum 99.999 percent purity
Grahic Jump Location
Comparison between the experimental and calculated values of the flow stress for aluminum 99.995 percent purity
Grahic Jump Location
Comparison between the experimental and calculated values of the flow stress for Al-0.1 percent Mg
Grahic Jump Location
Comparison between the experimental and calculated values of the flow stress for Al-0.345 percent Fe
Grahic Jump Location
Comparison between the experimental and calculated values of the flow stress for Al-0.5 percent Mg
Grahic Jump Location
Comparison between the experimental and calculated values of the flow stress for Al-1 percent Mg
Grahic Jump Location
Variation of the athermal and saturation mechanical threshold of aluminum with alloying content
Grahic Jump Location
Change in the Stage II or athermal work-hardening rate of aluminum with alloying content
Grahic Jump Location
Variation in the parameters ε̇0 (total) and ε̇0S (saturation) of aluminum with alloying content
Grahic Jump Location
Change in the parameters g0 (total) and g0S (saturation) of aluminum with alloying content

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