The present work aims to enhance the mechanical performance of monolithic Al alloy and single reinforced metal matrix composite using a hybridization technique. The microparticles of alumina and boron carbide were reinforced into cast Al alloy (6061) in a systematic varying ratio (i.e.100/0, 75/25, 50/50, 25/75 and 0/100) to prepare the hybrid metal matrix composites via stir casting method. The mechanical properties (i.e. tensile, impact, hardness and flexural) of the prepared composites were investigated as per ASTM standards. Furthermore, microstructural analysis of unfractured and fractured composite samples was also carried out using Scanning Electron Microscope. It was observed that hybrid composites comprising of microparticles revealed an enhanced tensile, flexural and hardness properties, and reduced impact energy and porosity as compared to Al alloy and single reinforced metal matrix composites. The highest values of tensile strength and modulus were offered by a hybrid composite (B50A50), which was 40% and 52.12% higher than that of Al alloy. Furthermore, there was an improvement of 105.72% in flexural strength and a reduction of 23.88% in impact energy for composite B50A50 than that of Al alloy. The present developed hybrid metal matrix composites can be proposed to be used in automobile parts and construction applications.

中文翻译：

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Al-Al2O3/B4C 混合复合材料的力学和微观结构分析

目前的工作旨在使用杂化技术提高整体铝合金和单一增强金属基复合材料的机械性能。将氧化铝和碳化硼微粒以系统变化的比例（即 100/0、75/25、50/50、25/75 和 0/100）增强成铸造铝合金（6061），以制备混合金属基复合材料。搅拌浇铸法。根据 ASTM 标准对制备的复合材料的机械性能（即拉伸、冲击、硬度和弯曲）进行了研究。此外，还使用扫描电子显微镜对未断裂和断裂的复合材料样品进行了微观结构分析。据观察，由微粒组成的混合复合材料显示出增强的拉伸、弯曲和硬度性能，与铝合金和单一增强金属基复合材料相比，冲击能和孔隙率降低。混合复合材料 (B50A50) 提供了最高的拉伸强度和模量值，比铝合金高 40% 和 52.12%。此外，复合材料 B50A50 的弯曲强度比铝合金提高了 105.72%，冲击功降低了 23.88%。目前开发的混合金属基复合材料可用于汽车零件和建筑应用。复合材料 B50A50 的冲击功比铝合金高 88%。目前开发的混合金属基复合材料可用于汽车零件和建筑应用。复合材料 B50A50 的冲击功比铝合金高 88%。目前开发的混合金属基复合材料可用于汽车零件和建筑应用。