Upper Bound Analysis of Closed-Die Forging of Eccentrically-Located SiCp AMC Preforms

Abstract

The paper presents the analysis of closed-die forging of eccentrically-located SiCp AMC cylindrical preforms at cold conditions using ‘U pperBound0 approach. The deformation has been considered in two subsequent stages, i.e. free barreling and constrained deformation stages. The second stage was again divided into two modes, i.e. unilateral and bilateral constrained deformations. For basic experimental analysis, the preforms were fabricated via liquid metal stir casting manufacturing route using LM6 Aluminium alloy and Silicon Carbide particles as reinforcements. These preforms were located eccentrically in the closed-die with respect to the die axis and subsequently forged into double-hub flange components. The generalized expressions for the velocity field, strain rates, various energy dissipations and average forging load were formulated for all the above deformation stages and results were compared with the experimental findings. It is expected that the present work will be useful for the analysis of the precision net-shape flashless closed-die forging operations at cold conditions.

Keywords

• closed-die forging
• sicp
• amc preforms
• double-hub flange component
• die load
• die-cavity fill