Effect of interfacial friction during forging of solid powder discs of large slenderness ratio | Zendy

Ravi Ranjan | Zendy; S. Kumar | Zendy

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Effect of interfacial friction during forging of solid powder discs of large slenderness ratio

Author(s) -

Ravi Ranjan,

S. Kumar

Publication year - 2004

Publication title -

sadhana

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.268

H-Index - 49

eISSN - 0973-7677

pISSN - 0256-2499

DOI - 10.1007/bf02703260

Subject(s) - forging , materials science , deformation (meteorology) , adhesion , work (physics) , die (integrated circuit) , buckling , composite material , surface (topology) , mechanics , metallurgy , mechanical engineering , geometry , physics , nanotechnology , engineering , mathematics

The paper reports an investigation into the effect of interfacial friction law during the forging of a powder circular disc with large slenderness ratio(L/D), between two flat dies. The deformation pattern during the operation is influenced by many factors, which interact with each other in a complex manner. The relative velocity between the work piece material and the die surface, together with high interfacial pressure and/or deformation modes, creates the conditions essential for adhesion in addition to sliding. The decisive factors are the interfacial conditions, initial relative density of the preform and geometry of the preform. An attempt has been made to determine the most realistic interfacial friction law and die pressures developed during such forging using an upper bound approach. The results so obtained are presented graphically and discussed critically to illustrate the interaction of various interfacial friction laws involved.

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