What question did this study set out to answer?

This research aims to assess how CDA and SiC reinforcements and T6 heat treatment affect the properties of Al7075 composites.

February 26, 2026

Investigation on the Effect of CDA/SiC Reinforcement and T6 Heat Treatment on the Microstructure, Mechanical and Tribological Behaviour of Al7075 Matrix Composites

Key Points

This research aims to assess how CDA and SiC reinforcements and T6 heat treatment affect the properties of Al7075 composites.
Synthesis of Al7075 composites via two-stage stir-casting process
Microstructural analysis using OM, FESEM, EDS, and XRD techniques
T6 heat treatment applied under varying temperatures and aging durations
T6 HT sample with 2.5% CDA and 2.5% SiC showed 44.36% increase in microhardness
Compressive strength increased by 42.99% compared to as-cast Al7075
Surface roughness reduced by 57.89%, indicating improved wear resistance

Abstract

Abstract This study investigates the influence of sustainable (CDA) and ceramic (SiC) reinforcements on the microstructural, mechanical, and tribological characteristics of Al7075 synthesized through a two-stage stir-casting process, along with the T6 heat treatment under varying temperatures and aging durations to optimize properties. The microstructural analysis employed optical microscopy (OM) and field emission scanning electron microscopy (FESEM) coupled with energy dispersive X-ray spectroscopy (EDS), elemental mapping, and X-ray diffraction (XRD) techniques. OM and XRD revealed significant grain refinement and the presence of different phases, respectively, while FESEM confirmed uniform dispersion and integration of reinforcement particles within the matrix. Quantitative results indicate substantial enhancement in mechanical strength and tribological Behavior driven by the synergistic effect of reinforcements and heat treatment. The T6 heat treated (HT) sample containing equal weight fractions of reinforcements (2.5% CDA and 2.5% SiC) exhibited peak microhardness and compressive strength increments of 44.36% and 42.99%, respectively, relative to the as-cast Al7075. Worn surface morphology was analysed using SEM and optical profilometry, identifying wear debris, parallel grooves, adhesive wear, and ploughing indicative of combined adhesive-abrasive wear mechanisms. Surface roughness (Ra) measurements showed a maximum reduction of 57.89% in sample containing equal weight fractions of reinforcements, highlighting improved wear resistance.

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Cite This Study

Lovevanshi et al. (Tue,) studied this question.

synapsesocial.com/papers/699fe35995ddcd3a253e7301 https://doi.org/https://doi.org/10.1115/1.4071205

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