Friction and its Influence on Material Flow in Extrusion-Forging of Rr58 Aluminium Alloy by Visio-Plastic Studies

  • K. Sivaram
  • K. P. Rao
  • H. Md. Roshan


RR58 aluminium alloy rings of two different geometries were subjected to isothermal upsetting in the temperature range 300–800 K, using some popular lubricants. Friction factors are evaluated using theoretical and experimental calibration curves available in literature. It is found that theoretical curves predict higher values of friction, and the actual friction factors are obtained by using suitable correction factors. The influence of specimen geometry on the friction factor is studied. Finally, with the aid of visio-plastic analysis, the effect of friction and temperature on the material flow and die filling in extrusion-forging process is highlighted.


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Copyright information

© Department of Mechanical Engineering University of Birmingham 1985

Authors and Affiliations

  • K. Sivaram
    • 1
  • K. P. Rao
    • 1
  • H. Md. Roshan
    • 2
  1. 1.Central Metal Forming InstituteHyderabadIndia
  2. 2.Department of Metallurgical Engineering Indian Institute of TechnologyMadrasIndia

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