Effect on abrasive water jet machining of aluminum alloy 7475 composites reinforced with CNT particles

Abstract

Using Taguchi's experimental design, which takes pressure, abrasive feed rate, and stand-off distance into account, this study examines mechanical properties of a novel carbon nanotube-reinforced aluminium metal matrix nanocomposites (AMMNC). It also examines machinability of the resulting nano composite. Optimization of outputs such as material removal rate and average roughness (Ra) is done using the TOPSIS method. Reinforcement of the aluminium alloy AA7475 (AA7475) with CNT is achieved by using different CNT weight fractions (3%, 6%, 9%) in the fabrication of AMMNC. ASTM procedures are used to evaluate mechanical properties such as tensile and compressive strength and hardness. When compared to as-cast AA7475, materials with a higher concentration of CNT have higher tensile strength (22.14%), compressive strength (29.01%), hardness (21.49%), wear resistance (64.51%), and corrosion resistance (98.6%). According to machining studies, when CNT is increased to 9 percent, the SR and MRR increase as well as abrasive flow rate, which necessitates an increase in abrasive flow rate to remove material from the composite.