Investigation of Mechanical Properties of Composite Al6061/Ni-Al2O3 Produced by Stir Casting Process

O. Adiyaman
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引用次数: 1

Abstract

Composites are widely used material types today, and it is known that matrices and additives in composites improve the mechanical properties of the material. In this study, Al6061 matrix and Ni-Al2O3 reinforced composite material was produced by stir casting method and the effect of Ni- Al2O3 mixture reinforcement on the hardness and tensile properties of the produced composite material was investigated. The determination of the mechanical properties of the samples obtained after the casting process was determined by the results of microhardness analysis and tensile test, and the internal structure of the material was examined by XRD analysis. According to the results of XRD analysis, it was determined that Ni and Al2O3 phases were formed together with the matrix element Al. The results of the tensile analyzes showed that the amount of strain in the composite material changed depending on the ratio of the reinforcement element, and the highest strain value occurred in the Ni-Al2O3 reinforced sample with Al matrix. However, it was observed that the brittle fracture mechanism was effective in all samples. While the highest microhardness value was obtained in sample 4 (Al6061+ (mass. %15) Ni+ Al2O3) with 89.6 HV0.5 value, the lowest microhardness value was obtained from pure Al sample with 66.7 HV0.5 value. As a result, it was determined that the Ni-Al2O3 reinforcement element increased the microhardness value in the Al matrix composite material.
搅拌铸造Al6061/Ni-Al2O3复合材料力学性能研究
复合材料是当今广泛使用的材料类型,众所周知,复合材料中的基体和添加剂可以改善材料的机械性能。采用搅拌铸造法制备了Al6061基体和Ni-Al2O3增强复合材料,研究了Ni-Al2O3混合增强对复合材料硬度和拉伸性能的影响。通过显微硬度分析和拉伸试验结果确定浇注后试样的力学性能,并通过XRD分析检查材料的内部组织。根据XRD分析结果,确定了Ni和Al2O3相与基体元素Al一起形成。拉伸分析结果表明,复合材料中的应变量随增强元素比例的变化而变化,其中以Al为基体的Ni-Al2O3增强试样应变值最高。然而,观察到所有样品的脆性断裂机制都是有效的。而试样4 (Al6061+)的显微硬度值最高。纯Al样品的显微硬度最低,HV0.5值为66.7。结果表明,Ni-Al2O3增强元素提高了Al基复合材料的显微硬度值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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