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  Scopus ID: 21100926589

Tribological and Mechanical Properties of Al7075 Metal Matrix Composite Reinforced with CoMoMnNiV High Entropy Alloy Particles

Pradip Kumar Verma , Alok Singh and Akshay Kumar

Abstract

Al7075 metal matrix composite (MMC) reinforced with High Entropy Alloy particles (HEAp) fabricated by stir casting technique. Mechanical and tribological behaviour of alloy and composite with varying content of CoMoMnNiV HEAp (5%, 7.5%, and 10%) were studied. Rockwell hardness of composite is tested with increasing content of HEAp. A hardness value of 112 HRB was obtained with 10 wt.% of HEAp which is 38% higher than base aluminum composite. The impact strength of composite with 10 wt.% of reinforcement has the highest value among other compositions. The tribological properties of the composite were tested under dry conditions using pin-on-disc apparatus with different sliding distances and applied normal load. The wear rate decreases with an increase in reinforcement content and reached to least at 10 wt.% of HEAp. Wear mass loss increases with an increase in applied normal load and sliding distance. The tribological behavior of the composite was significantly improved due to the presence of hard HEAp. The worn surface morphology of the wear sample was examined by images obtained from scanning electron microscopy (SEM). The shallow grooves present on worn surfaces indicate abrasive wear takes place, while deep grooves occur due to an increase in normal load. Composite with 10 wt.% of HEAp has better wear resistance in all loading conditions and substantial sliding distance.

Published on: May 18, 2023
doi: 10.17756/nwj.2023-s1-115
Citation: Verma PK, Singh A, Kumar A. 2023. Tribological and Mechanical Properties of Al7075 Metal Matrix Composite Reinforced with CoMoMnNiV High Entropy Alloy Particles. NanoWorld J 9(S1): S596-S600.

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