Morphological and mechanical behavior of novel Al7075 (T6) + 3.5% SiC + 0.3% CR + 5.5% MoS 2 -based green hybrid composite: An experimental analysis and optimization via TOPSIS

In the current scenario, high-performance, economical, and eco-friendly materials are the main objectives for many researchers in the field of material science. Therefore, this article demonstrates the novel green HMMCs comprise Al7075-T6 as a base alloy matrix with three distinct reinforced particles (such as silicon carbide (SiC), crumb rubber (CR), and molybdenum disulfide (MoS₂)) is effectively doped via stir casting technique for the lightweight applications in an automotive and avionics industries. Besides, the different range of process variables such as SiC, CR, and MoS₂ along with stirring speed, stirring time, and pouring temperature are elected for the synthesis of green composites via Taguchi L₁₈ mixed-level orthogonal array. The parametric analysis of synthesized green HMMCs in terms of impact strength (in J) and compressive strength (in MPa) is examined with the help of the Taguchi design of experimentation and pooled analysis of variance. Moreover, metallographic inspection is also done via optical microscope and SEM-EDS techniques. The proposed green hybrid sample (S₃) capitulates a superior enhancement in its microstructure, impact strength (up to 62.66%), and compressive strength (up to 22.78%) as compared with base alloy composite (S₀). Furthermore, Taguchi's experimental outcomes are compared and validated via the technique for order of preference by similarity to ideal solution algorithm for better validation of the impact strength and compressive strength of the Al-based green hybrid metal matrix composite (S₃).