Studies Using Simulation to Examine the Behaviour of Sintered Aluminium Preforms during Densification

Abstract

Powder metallurgy process has the advantage of optimized material utilization with near net shape, resulting in reduced costs. The densification behavior of sintered aluminium under different loading conditions plays an important role in assessing the performance of parts. The experimental studies to examine the densification behavior are cost intensive and less flexible. Therefore, simulation studies are conducted and results are compared with the experimentation results. The FEA-based DEFORM-2D tool is used for modeling and simulation purposes. The performance curves of load vs. displacement are plotted. A new material is (Al-cr3c2) made and a flow curve is constructed using the disc compression test findings and using software to meet the experimentally observed flow stress. The relationship between stress and strain is studied under different loading conditions of sintered aluminium preforms during densification. Formability stress and strain in plane stress state condition initially rise with the rise in axial strain and then remain constant throughout the process. With a rise in the height reduction percentage, the relative density rises. The final density is higher because there are more pores in the sample when the aspect ratio is lower and the rate of densification is slower.

Keywords

• compression test
• deform-2D
• densification
• simulation
• sintered preforms