Investigations into Deformation Characteristics during Open-Die Forging of SiC_p Reinforced Aluminium Metal Matrix Composites

Abstract

The deformation characteristics during open-die forging of silicon carbide particulate reinforced aluminium metal matrix composites (SiC AMC) at cold conditions are investigated. The material was fabricated by liquid stir casting method in which preheated SiC particles were mixed with molten LM6 aluminium casting alloy and casted in the silicon mould. Finally, preforms obtained were machined in required dimensions. Two separate cases of deformation, that is, open-die forging of solid disc and solid rectangular preforms, were considered. Both upper bound theoretical analysis and experimental investigations were performed followed by finite element simulation using DEFORM, considering composite interfacial friction law, barreling of preform vertical sides, and inertia effects, that is, effect of die velocity on various deformation characteristics like effective stress, strain, strain rate, forging load, energy dissipations, and height reduction. Results have been presented graphically and critically investigated to evaluate the concurrence among theoretical, experimental, and finite element based computational findings.

Finite Element Analysis and Experimental Study on the Effect of Extrusion Ratio during Hot Extrusion Process of Aluminium Matrix Composites

“…Aluminium matrix composites (AMC) are synergic materials having high specific strength, high specific modulus, high wear resistance and improved high temperature properties [1][2] . They are the potential materials to replace metals and alloys in weight critical applications.…”

Numerical Analysis of Cold Forging Effect on Mechanical Properties of Al/Sic Metal Matrix Composites

“…As specified here DEFORM-3D software to do finite element analysis to find the Forging Properties of material [1]. This tool has a material library with the properties and allow user to change as per the requirement.…”

Deformation characteristics of aluminium-copper composite preforms at different strain rates during cold forging

“…They showed that strength property is very high at 5% of SiC with copper and the initiation of crack appeared at a low axial strain with higher value of SiC addition. Verma et al (2013) have investigated the deformation characteristics during open-die forging of silicon carbide particulate reinforced aluminium metal matrix composites (Si-Cp AMC) at cold conditions. Authors have not yet come across the investigations in which the effect of strain rate (based on ram velocity) on the composite preform has been taken into consideration, as the strain rate is one of the most important parameter in forging process.…”