Effect of ZrB2 and ZrC and mixing method on Mechanical properties and wear behaviour of Al7075 based composites for aircraft aerofoil surfaces

Journal of Alloys and Metallurgical Systems Pub Date : 2024-10-16 DOI:10.1016/j.jalmes.2024.100118

R. Malkiya Rasalin Prince , D. Arulkirubakaran , S. Christopher Ezhil Singh , C. Prabha , I. Darwin Immanuel

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Abstract

Developing lightweight materials with notable properties for aerospace applications is a great challenge. The impact of ZrB₂ and ZrC reinforcement on the mechanical and wear behaviour of stir-cast Al7075-ZrB₂-ZrC composites is investigated with a weight percentage of 2, 4, 6 and 8 % ZrB₂, and fixed 2 % ZrC. The results showed notable improvements with a hardness of 96 HRB, tensile strength of 423 MPa and compressive strength of 385 MPa; hardness increased by 14 %, tensile strength increased by 11 % and compressive strength was enhanced by 13 % when compared with pure Al7075. The wear behaviour has been analysed by pin-on-disc wear test at room temperature with loads of 10 N and 20 N against the sliding distance of 400 m to 1200 m; the wear resistance is improved by 17 % and CoF is reduced by 11 % compared to pure Al7075. SEM micrographs display the wear mechanism and microstructural changes happened during the wear test. Al7075-ZrB₂-ZrC composites are the optimum replacement for aerofoil surfaces because of their remarkable properties.

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ZrB2 和 ZrC 及混合方法对飞机机翼表面用 Al7075 基复合材料机械性能和磨损行为的影响

为航空航天应用开发具有显著性能的轻质材料是一项巨大的挑战。研究了 ZrB2 和 ZrC 增强对搅拌铸造 Al7075-ZrB2-ZrC 复合材料机械性能和磨损性能的影响，ZrB2 的重量百分比为 2%、4%、6% 和 8%，ZrC 的重量百分比固定为 2%。结果表明，与纯 Al7075 相比，复合材料的硬度明显提高，达到 96 HRB，抗拉强度达到 423 MPa，抗压强度达到 385 MPa；硬度提高了 14%，抗拉强度提高了 11%，抗压强度提高了 13%。与纯 Al7075 相比，该材料的耐磨性提高了 17%，CoF 降低了 11%。扫描电镜显微照片显示了磨损试验过程中发生的磨损机理和显微结构变化。Al7075-ZrB2-ZrC 复合材料因其卓越的性能而成为机翼表面的最佳替代品。

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来源期刊

Journal of Alloys and Metallurgical Systems

CiteScore

0.50

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0.00%

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