Modeling Aspects of Hot Densification and Deformation Studies on Al–TiB₂ Composite Preforms

Abstract

The modeling aspects of hot deformation and densification behavior of Al–TiB₂ composites are discussed in the present paper. A constitutive relation capable of relating the flow stress to the strain at different temperatures, namely 200°C, 300°C, 400°C, and 500°C, and at different strain rates, namely 0.12, 0.14, 0.16, and 0.18 s⁻¹, have been developed and the developed relation has been used to predict the deformation behavior and the densification attained for different deformation levels and temperatures. The distribution of density and the location of maximum and minimum density zones have been predicted using DEFORM 2D, a finite element analysis (FEA) based software. The damage mechanism that governs the densification process has been identified and the critical damage value has been found.

Keywords:

• Al–TiB₂ sintered preforms
• Constitutive equation
• Damage
• DEFORM-2D
• FEA
• Hot deformation
• Hot densification
• Modeling
• P/M