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Article

Deformation Behavior of Cold Upset Forming of Sintered Al-Fe Composite Preforms

[+] Author and Article Information
N. Selvakumar

Department of Mechanical Engineering, Mepco Schlenk Engineering College, Virudhunagar-District, Pin: 626 005, Tamilnadu, Indiae-mail: nselva@mepcoeng.ac.in

R. Narayanasamy

Department of Production Engineering, National Institute of Technology, Tiruchirappalli-620 015, Tamilnadu, Indiae-mail: narayan@nitt.edu

J. Eng. Mater. Technol 127(2), 251-256 (Apr 06, 2005) (6 pages) doi:10.1115/1.1867984 History: Received December 15, 2003; Revised December 27, 2004; Online April 06, 2005
Copyright © 2005 by ASME
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References

Antes, H. W, 1972, “Processing and Properties of Powder Forgings,” Powder Metallurgy High Performance Applications, edited by Burke, J. J., Weiss, V., Syracuse University Press, Syracuse, NY.
Kahlow, K. J., 1971, “Void Behavior as Influenced by Pressure and Plastic Deformation,” Institute for Metal Forming Report, Lehigh University, pp. 10–16.
Shabaik,  A. H., 1971, “Prediction on the Geometry Changes of the Free Boundary During Upsetting by the Slip Line Theory,” J. Eng. Ind., 93, pp. 586–592.
Lee,  C. H., and Altan,  T., 1972, “Influence of Flow Stress and Friction Upon Metal Flow in Upset Forging of Rings and Cylinders,” J. Eng. Ind., 94, pp. 775–782.
Hashmi,  M. S. J., 1978, “Upsetting of Cylindrical Billets Between Flat Platens Having Unequal Frictional Properties,” Int. J. Mach. Tool Des. Res., 18, pp. 189–196.
Yang,  D. Y., Choi,  Y., and Kim,  J. H., 1991, “Analysis of Upset Forging of Cylindrical Billets Considering the Dissimilar Frictional Conditions at Two Flat Die Surfaces,” Int. J. Mach. Tools Manuf., 31(3), pp. 397–404.
Tabata,  T., and Masaki,  S., 1982, “Coefficient of Friction Between Metal Powder and Wall During Compaction,” Powder Metall., 13, pp. 179.
Selvakumar,  N., and Narayanasamy,  R., 2003, “Phenomenon of Strain Hardening Behavior of Sintered Aluminum Preforms During Cold Axial Forming,” J. Mater. Process. Technol., 142(2), pp. 347–354.
Narayanasamy,  R., and Pandey,  K. S., 1997, “Salient Features in the Cold Up-Set Forming of Aluminum-3.5% Alumina Powder Composite Preforms,” J. Mater. Process. Technol., 72, pp. 201–207.
Narayanasamy,  R., and Pandey,  K. S., 1997, “Phenomenon of Barrelling in Aluminum Solid Cylinders During Cold Upset Forming,” J. Mater. Process. Technol., 70, pp. 17–21.

Figures

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SEM Micro Photograph of aluminum and iron powder, 500X
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Schematic diagram of the compacting process before and after deformation
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Microstructure of Al–2%Fe Composite preforms, 100X: (a) green compact before sintering; (b) after sintering; and (c) end of deformation.
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The relationship between σz and εz
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The relationship between (ρfth) and ez−εθ)
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The relationship between σz and (ρfth)
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The relationship between Poisson’s ratio and (ρfth)
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Variation of Poisson’s ratio with respect to (ρfth)
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Variation of stresses with respect to the axial strain for Al–Fe composites.

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