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Characterization of AZ91 /alumina nanocomposite produced by FSP

机译：FSP生产的AZ91 /氧化铝纳米复合材料的表征

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摘要

The microstructures, wear property and micro-hardness of AZ91 Mg alloy/alumina particle reinforced nano-composite produced by friction stir processing (FSP) were investigated. The initial microstructures of the AZ91 were composed of irregularly distributed P-phases (AluMgn). while the FSPed specimens were characterized by the homogeneous distribution of alumina particles, the recrystallized grain structure and the dissolution of (J-phase. The results showed an improvement in the hardness, wear property of the FSPed zone as results of more grain refinement and pinning effect of nano-alumina particles as compared to those of the base metal. The hardness of the FSPed zone was a higher and more homogeneously distributed and the wear resistance as evaluated by Dry sliding wear tests, was superior, as compared with the base metal.
机译：研究了摩擦搅拌法制备的AZ91镁合金/氧化铝颗粒增强纳米复合材料的组织，磨损性能和显微硬度。 AZ91的初始微观结构由不规则分布的P相（AluMgn）组成。而FSPed试样的特征在于氧化铝颗粒的均匀分布，再结晶的晶粒结构和（J相）的溶解。结果表明，随着晶粒细化和钉扎的增加，FSPed区的硬度，耐磨性得到了改善。与贱金属相比，FSPed区的硬度更高，分布更均匀，并且通过干滑动磨损测试评估的耐磨性优于贱金属。

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