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Journal of Materials Shaping Technology

, Volume 9, Issue 4, pp 183–192 | Cite as

Novel processing method for metallic materials

  • A. Sherif El-Gizawy
Article
  • 46 Downloads

Abstract

The feasibility of a new process that integrates all thermal and mechanical operations involved in the production of wrought metal strips was examined. The process involves continuous extrusion on a screw type extruder. A Pb-2.0% Sb alloy was used as a model material. Continuous strips of metal could be produced when back leakage of the melt was limited. For this, the clearance between screw and extruder barrel had to be kept small and the viscosity of the partially solidified alloy had to be kept high by limiting the rotational speed and by maintaining an experimentally determined temperature profile along the extruder barrel. Intense shearing of the material resulted in rapid homogenization and in dynamic recrystallization of the metallic matrix.

Keywords

Flow Stress Solution Heat Treatment Extrusion Pressure Extrusion Force Radial Clearance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. S. El-Gizawy, and J. A. Schey, “Product Microstructure and Properties Induced by Hot Working a Pb-1.85% Sb Alloy,”Metallurgical Transactions, 16A 1985, pp. 1273–1283.Google Scholar
  2. 2.
    A. S. El-Gizawy, and J. A. Schey, “Application of Controlled Rolling to a Low-Antimony Lead Alloy,”Canadian Metallurgical Quarterly, 24, 1985, pp. 91–99.Google Scholar
  3. 3.
    M. Kiuchi, S. Sugiyama, and K. Arai, “Study of Metal Forming in the Mushy State 1st Report: Flow Stress and Deformation Behaviour of Alloy in Mushy State,” Proceedings of the 20th Int. MTDR Conference, 1980, pp. 71–78.Google Scholar
  4. 4.
    M. Kiuchi, S. Sugiyama, and K. Arai, “Study of Metal Forming in Mushy State 2nd Report: Extrusion of Tube, Bar, and Wire of Alloys in Mushy State,” Proceedings of the 20th Int. MTDR Conference, 1980, pp. 79–86.Google Scholar
  5. 5.
    M. Kiuchi, “Application of Mushy-State Working Processes to Production of Metal-Ceramics Composites,”Annals of the CIRP, 36, 1987, pp. 173–176.CrossRefGoogle Scholar
  6. 6.
    S. D. E. Ramati, G. J. Abbuschian, D. G. Backman, and R. Mehrabian, “Forging of Liquid and Partially Solid Sn-15% Pb and Aluminium Alloys,”Metallurgical Transactions, 9B, 1978, pp. 279–286.Google Scholar
  7. 7.
    M. C. Flemings,Solidification Processing, McGraw-Hill, New York, 1974.Google Scholar
  8. 8.
    G. Williams, and K. M. Fisher, “Squeeze Forming of Aluminium-Alloy Components,”Metals Technology, 8, 1981, pp. 263–271.Google Scholar
  9. 9.
    A. S. El-Gizawy, “The Role of Thermomechanical Processing in Controlling Microstructure and Properties of Low-Antimony Lead Alloys,” Ph.D. Thesis, University of Waterloo, Waterloo, Ontario, 1983.Google Scholar
  10. 10.
    H. P. Stuwe, “Einige Abschatzungen zum Strangpressen,Metall, 22, 1968, pp. 1197–1200.Google Scholar
  11. 11.
    S. Kalpakjian,Manufacturing Processes for Engineering Materials, Addison-Wesley, Reading, Massachusetts, 1991.Google Scholar
  12. 12.
    J. A. Schey,Introduction to Manufacturing Processes, McGraw Hill, New York, 1987.Google Scholar
  13. 13.
    D. B. Spencer, R. Mehrabian, and M. C. Flemings, “Rheological Behavior of Sn-15% Pb in the Crystallization Range,”Metallurgical Transactions, 3, 1972, pp. 1925–1932.CrossRefGoogle Scholar
  14. 14.
    M. M. Kamal, “A High Pressure Clearance Seal,” ASME,J. Lubrication Technology, 1968, pp. 412–416.Google Scholar

Copyright information

© Springer-Verlag New York Inc 1991

Authors and Affiliations

  • A. Sherif El-Gizawy
    • 1
  1. 1.Industrial and Technological Development Center, Department of Mechanical and Aerospace EngineeringUniversity of Missouri-ColumbiaColumbia

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