Tribological behavior and mechanical properties of friction stir processed HDPE/Fe-Fe3O4 composites

Saeed Karimi, S. M. Arab, S. Zeidabadi, S. Javadpour
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引用次数: 2

Abstract

In the current work, high density polyethylene (HDPE) composites were fabricated via Friction Stir Processing (FSP). A two-phase Fe-Fe3O4 powder was used as the reinforcing agents. The extremely low cost powder was obtained from shot-blasting of as-forged low carbon steel components. X-ray diffraction (XRD) was used to phase analysis and evaluation of the purity of the as-received powder. The size distribution of the powder was determined by Laser Particle Size Analysis (LPSA). Also, Scanning Electron Microscopy (SEM) was employed to investigate the particles morphology. The processing used a cylindrical tool to impose the severe plastic deformation and material stirring in order to improve the mechanical properties and particles distribution. The tribological and mechanical properties of the fabricated samples were examined. According to the results, both the friction coefficient and specific wear rate of FSPed samples reduced remarkably. The hardness and tensile strength of the FSPed composites were higher than the FSPed HDPE samples; however, their elongations were lower.
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搅拌摩擦加工HDPE/Fe-Fe3O4复合材料的摩擦学行为和力学性能
本文采用搅拌摩擦法制备了高密度聚乙烯(HDPE)复合材料。采用两相Fe-Fe3O4粉末作为补强剂。通过对锻态低碳钢构件进行抛丸处理,获得了成本极低的粉末。采用x射线衍射(XRD)对所得粉体进行物相分析和纯度评价。采用激光粒度分析(LPSA)确定了粉末的粒度分布。并用扫描电子显微镜(SEM)对颗粒形貌进行了研究。该工艺采用圆柱刀具施加剧烈的塑性变形和搅拌材料,以改善机械性能和颗粒分布。测试了制备样品的摩擦学和力学性能。结果表明,FSPed试样的摩擦系数和比磨损率均显著降低。FSPed复合材料的硬度和抗拉强度均高于FSPed HDPE样品;然而,它们的伸长较低。
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