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자료유형
학술저널
저자정보
S. Ayyanar (Anna University) A. Gnanavelbabu (Anna University) K. Rajkumar (SSN College of Engineering) P. Loganathan (Anna University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.8
발행연도
2021.1
수록면
3,040 - 3,057 (18page)

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This present work deals with the use of hexagonal boron nitride (h-BN) as a solid lubricant for AA6061/B4C composite due toits special features of self-lubricating property, thermal and chemical stability. The wear behaviour of composites at elevatedtemperature test, varied from 27 to 300 °C, was performed for AA6061 alloy with boron carbide (B4C) 5–15 wt% and h-BN5–15 wt% reinforced hybrid composites under a load of 10 and 45 N at constant sliding velocity and sliding distance of2.2 m/s and 2500 m. The prepared composites were characterized using X-ray diffraction, scanning electron microscopy withenergy dispersive X-ray analysis. The mechanical properties of hybrid composites were evaluated using tensile testing andhardness. The microstructural results revealed a homogenous distribution of reinforcement particles and grain refinement inthe composites up to 10 wt% of h-BN. The tensile test results showed a significant improvement in the tensile strength up to82% attained for the 15% B4Cand 5% h-BN hybrid composite compared to AA6061 matrix alloy. The wear behaviour anddifferent wear mechanisms under various testing conditions were explored. The mild-severe wear transition is noticed withincreasing load and temperature for AA6061. The wear properties of a hybrid composite of C10N10exhibited superior wearresistance due to the complete lubrication effect on the entire worn surface. The predominant wear of abrasive and adhesionoccurred at room and elevated temperatures and low load conditions. Oxidative wear, plastic deformation, and delaminationwear were operating with an increase in load and temperature.

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