Abstract

AA6082/B₄C and AA6082/SiC were prepared via stir casting accompanied by an inert-gas to prevent oxidation. The samples for both the composites were produced with varying wt% of 0, 5, 10, 15 and 20 of B₄C and SiC for their respective composites. This work gives emphasis on the comparative measurements of hardness, tensile strength, percentage elongation, Impact strength, density and porosity of the AA6082/B₄C and AA6082/SiC composites. The microstructural was studied using X-ray diffractometer and SEM. The micro hardness in AA6082/B₄C composites increases to 15.8% and the increase in AA6082/SiC composites is 11.9% only when compared with the base alloy whereas the increase in ultimate tensile strength for B₄C and SiC reinforced composites was reported to be 31% and 19.1% respectively. At 20 wt% of B₄C, hardness and tensile strength of AA6082/B₄C composite tends to decrease due to the development of clusters and increased porosity. The transformation in the nature of material from ductile to brittle decreases the impact strength and the resistance in the flow ability presented by the hard ceramic particles lowers down the percentage elongation. Density reduces from 2.67 g/cm³ in base alloy to 2.48 g/cm³ in AA6082/B₄C and 2.56 g/cm³ in AA6082/SiC composites respectively. The formation of voids in AA6082/SiC composites makes it less porous then AA6082/B₄C composites and this was because of the more agglomeration in SiC composites due to their high density.

Graphic Abstract

中文翻译：

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B4C 和 SiC 颗粒增强的 AA6082 基复合材料的物理和机械性能比较测量通过搅拌铸造生产

摘要

AA6082/B ₄ C和AA6082/SiC通过搅拌浇铸和惰性气体防止氧化制备。两种复合材料的样品是用不同重量百分比的 0、5、10、15 和 20 的 B ₄ C 和 SiC 生产的，用于它们各自的复合材料。这项工作重点比较测量 AA6082/B ₄ C 和 AA6082/SiC 复合材料的硬度、拉伸强度、伸长率、冲击强度、密度和孔隙率。使用 X 射线衍射仪和 SEM 研究显微结构。AA6082/B ₄ C 复合材料的显微硬度增加到 15.8%，AA6082/SiC 复合材料的显微硬度仅比基体合金增加 11.9%，而 B _{4 的}极限抗拉强度增加据报道，C 和 SiC 增强复合材料分别为 31% 和 19.1%。在 B ₄ C为 20 wt% 时，AA6082/B ₄ C 复合材料的硬度和拉伸强度由于团簇的发展和孔隙率的增加而趋于降低。材料的性质由韧性转变为脆性降低了冲击强度，而硬质陶瓷颗粒对流动能力的阻力降低了伸长率。密度分别从基础合金的2.67 g/cm ³降低到AA6082/B ₄ C 的2.48 g/cm ³和AA6082/SiC 复合材料的2.56 g/cm ³。AA6082/SiC 复合材料中空隙的形成使其多孔性低于 AA6082/B ₄C 复合材料，这是因为 SiC 复合材料的高密度导致更多的团聚。

图形摘要