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Experimental Result Paper | Mechanical Engineering | India | Volume 13 Issue 12, December 2024 | Popularity: 5.2 / 10

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An Experimental Study on Wear Strength of Aluminium 7075 Reinforced with Magnesium and Boron Carbide

Raviprakash T N, Sreedharamurthy T, Thimmegowda M B

Abstract: Over the past decade, the demand for lightweight materials with exceptional energy properties and high strength-to-weight ratios has significantly driven advancements in the automotive and aerospace industries, favoring the development and utilization of aluminium alloy-based composites. In this study, Aluminium 7075 (Al 7075) is reinforced with 2% by weight of magnesium and varying proportions of boron carbide particles. The composite is fabricated using the stir casting method. Aluminium 7075 serves as the base material, with a constant magnesium content and boron carbide particles added at variable ratios of 0%, 0.5%, 1%, 1.5%, and 2%. To ensure a uniform distribution of reinforcement particles, the mixed material is cast into cylindrical shapes using a metal mold. The resulting samples are machined to evaluate their pin-to-disk wear behavior under dry sliding conditions. A ground EN-32 disc with a surface roughness of 0.394 ?m and a hardness of 62 HRC serves as the rotating counterpart, while the composite sample (pin) remains fixed. Testing parameters include a fixed sliding distance of 2000 meters, a velocity of 2.5 m/s, and a normal load of 20 N. The microstructure and mechanical properties of the composite specimens are examined to assess tensile strength, hardness, and wear performance in accordance with ASTM standards. Scanning Electron Microscopy (SEM) is employed to analyze particle distribution and surface characteristics.

Keywords: Metal matrix composite, Aluminium 7075, Magnesium, Boron Carbide, Stir casting

Edition: Volume 13 Issue 12, December 2024

Pages: 1577 - 1582

DOI: https://www.doi.org/10.21275/SR241222112725

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