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Microstructural, Microhardness and tribological analysis of cooling-assisted friction stir processing of high-entropy alloy particles reinforced aluminum alloy surface composites
Surface Topography: Metrology and Properties ( IF 2.7 ) Pub Date : 2020-08-28 , DOI: 10.1088/2051-672x/abade4
Xiao Yang , Hongxia Zhang , Buyun Cheng , Yongquan Liu , Zhifeng Yan , Peng Dong , Wenxian Wang

High-entropy alloy (HEA) is a promising reinforcing material for aluminium alloys. In this work, cooling-assisted friction stir processing was applied to produce aluminium alloy surface composites reinforced with HEA particles. The effects of the volume fraction of HEA particles on the microstructure, microhardness and tribological properties were studied. The fabricated composites had uniformly distributed HEA particles and showed an excellent interfacial bonding between HEA particles and the matrix. The grain size of the fabricated composites was more refined than that of the base metal, and the grain sizes of the composites with 5 vol.%, 10 vol.% and 15 vol.% HEA particles were refined from a range of 2–15 μ m of aluminium matrix to 1.8, 1.4 and 1.1 μ m, respectively. The increased volume fraction of HEA particles caused an improvement in hardness and wear resistance. The composites reinforced with 15 vol.% HEA particles showed a 65.9% increase in hardness, a 43.0...

中文翻译:

高熵合金颗粒增强铝合金表面复合材料冷却辅助摩擦搅拌过程的组织,显微硬度和摩擦学分析

高熵合金(HEA)是铝合金的有希望的增强材料。在这项工作中,采用了冷却辅助摩擦搅拌工艺来生产用HEA颗粒增强的铝合金表面复合材料。研究了HEA颗粒的体积分数对显微组织,显微硬度和摩擦学性能的影响。制成的复合材料具有均匀分布的HEA颗粒,并且在HEA颗粒和基体之间显示出出色的界面结合。制成的复合材料的晶粒尺寸比贱金属的晶粒尺寸更细,含有5%(体积),10%(体积)和15%(体积)HEA颗粒的复合材料的晶粒尺寸在2-15范围内细化。铝基质的μm分别为1.8、1.4和1.1μm。HEA颗粒体积分数的增加导致硬度和耐磨性的提高。用15%(体积)HEA颗粒增强的复合材料的硬度增加了65.9%,而硬度增加了43.0%。
更新日期:2020-08-29
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