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首页> 外文期刊>Materials & design >Influence of reinforcements (SiC and A1_2O_3) and rotational speed on wear and mechanical properties of aluminum alloy 6061-T6 based surface hybrid composites produced via friction stir processing
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Influence of reinforcements (SiC and A1_2O_3) and rotational speed on wear and mechanical properties of aluminum alloy 6061-T6 based surface hybrid composites produced via friction stir processing

机译:增强材料(SiC和A1_2O_3)和旋转速度对通过摩擦搅拌工艺生产的6061-T6铝合金表面杂化复合材料的磨损和力学性能的影响

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摘要

In this investigation, the influence of rotational speed and reinforcement particles such as silicon carbide (SiC), alumina (A1_2O_3) on wear and mechanical properties of aluminum alloy based surface hybrid composites fabricated via friction stir processing (FSP) was studied. Taguchi method was employed to optimize the rotational speed and volume percentage of reinforcement particles for improving the wear and mechanical properties of surface hybrid composites. The fabricated surface hybrid composites have been examined by optical microscope for dispersion of reinforcement particles. Microstructures of all the surface hybrid composites revealed that the reinforcement particles (SiC and A1_2O_3) are uniformly dispersed in the nugget zone. It also revealed that the microhardness at optimum condition is increased due to presence and pining effect of hard SiC and A1_2O_3 particles. It is found that the reinforcement particles (i.e. SiC and A12O3) reduced in size (~5 um) than the as received particles size and also observed that the wear resistance at optimum condition is immensely improved. The observed wear and mechanical properties have been correlated with microstructures and worn micrographs.
机译:在这项研究中,研究了转速和诸如碳化硅(SiC),氧化铝(A1_2O_3)之类的增强颗粒对通过摩擦搅拌工艺(FSP)制备的铝合金基表面复合材料的磨损和力学性能的影响。使用Taguchi方法优化增强颗粒的转速和体积百分比,以改善表面杂化复合材料的磨损和机械性能。制备的表面杂化复合材料已经通过光学显微镜检查了增强颗粒的分散性。所有表面杂化复合材料的微观结构均表明,增强颗粒(SiC和Al_2_2_3)均匀地分散在熔核区。这也表明,由于硬质SiC和Al_2O_3颗粒的存在和钉扎效应,在最佳条件下的显微硬度增加了。发现增强颗粒(即SiC和Al 2 O 3)的尺寸(〜5μm)比所接收的颗粒尺寸减小(〜5μm),并且还观察到在最佳条件下的耐磨性得到了极大的改善。观察到的磨损和机械性能已与微观结构和磨损显微照片相关联。

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