Dry sliding wear performance of hybrid composites, comprising AlMg1SiCu alloy, titanium carbide, and molybdenum disulfide fabricated through stir casting process at different temperature condition

The objective of the present investigation is to assess the impact of AlMg1SiCu alloys with soft and hard microparticle reinforcements affects the dry sliding wear behavior of metallic composites at elevated temperatures. Traditional fabrication techniques of melt-stir casting were employed for processing the ex-situ-synthesized hybrid composites. Molybdenum disulfide (MoS₂) and Titanium carbide (TiC) microparticles were added in different quantities varying from 1 to 3% MoS₂ to a constant 8% TiC. Materials underwent testing across a range of temperatures to simulate wear conditions prevalent at elevated temperatures: 453 K, 473 K, 493 K, and 513 K. Wear tests at elevated temperatures were systematically conducted under consistent parameters, encompassing a sustained load 24.5 N, sliding speed 3.14 m/s and sliding distance of 2000 m for each trial. The comparative analysis with the AlMg1SiCu matrix material, Observations revealed an enhancement of wear resistance at the temperature range of 513 K for the chosen hybrid composites. A comprehensive discussion was undertaken regarding high temperature dry sliding characteristics of the matrix material and hybrid composites. The study of the worn surfaces revealed the high-temperature wear behaviour of hybrid composites encompassed adhesive, delamination, and oxidation wear processes.