Title: Forging of hollow sintered powder preforms

Authors: A.K. Jha, Suneel Kumar

Addresses: Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi &ndash 221 005, India. ' Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi – 221 005, India

Abstract: The forging of sintered metal powder preforms is currently arousing interest in many parts of the world as an economic method of producing components from metal powders. The present investigation has been undertaken with a view to studying the deformation characteristics of hollow sintered copper powder discs at room temperature. A theoretical analysis based on the energy method is presented for the estimation of deformation load using yield criterion for porous sintered materials and an appropriate interfacial friction law. Experiments have also been conducted which involved the forging of hollow discs of electrolytic copper powder at room temperature under axisymmetric conditions. In order to illustrate the validity of the theoretical approach, the theoretical and experimental results have been compared and presented graphically.

Keywords: densification; interfacial friction; neutral radius; sintered powder preforms; velocity field; forging; metal powders; deformation; hollow discs; electrolytic copper powder.

DOI: 10.1504/IJMPT.1998.036250

International Journal of Materials and Product Technology, 1998 Vol.13 No.3/4/5/6, pp.427 - 446

Published online: 01 Nov 2010 *

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