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Investigating Mechanical Properties, Corrosion Resistance and Machining Characteristics of Al5083-Graphene Composites Produced by Friction Stir Processing
Transactions of the Indian Institute of Metals ( IF 1.6 ) Pub Date : 2020-10-10 , DOI: 10.1007/s12666-020-02098-1
G. V. N. B. Prabhakar , Lingaraju Dumpala , N. Ravi Kumar

In the present work, Al5083-Graphene composite was successfully produced by friction stir processing (FSP). Appearance of texture in FSPed Al5083 with and without Graphene was clearly observed from the X-ray diffraction analysis. Increased hardness and tensile strength were measured for both the FSPed samples compared with the base alloy due to the grain refinement and additionally due to the presence of Graphene in the composite. However, the % of elongation of the composite was decreased compared with FSPed and base material. Machining studies from drilling experiments revealed higher cutting forces for FSPed Al5083 compared with the composite and base material. These results suggested that the presence of Graphene acted as solid lubricant which increased the machinability and decreased the cutting forces during drilling. Corrosion behavior assessed by electrochemical studies indicated decreased corrosion resistance for the composite compared with FSPed alloy, but was marginally improved compared with that of base material. The results demonstrated improved mechanical properties and better machinability of Al5083-Graphene composites. However, deteriorated corrosion resistance is an important concern must be considered, while developing Al5083-Graphene composite by FSP.



中文翻译:

搅拌摩擦法制备Al5083-石墨烯复合材料的力学性能,耐蚀性和加工性能的研究

在目前的工作中,通过摩擦搅拌工艺(FSP)成功地生产了Al5083-石墨烯复合材料。从X射线衍射分析清楚地观察到在有和没有石墨烯的情况下FSPed Al5083中的织构外观。由于晶粒细化以及另外由于复合物中存在石墨烯,与基体合金相比,两种FSPed样品的硬度和抗拉强度均得到了提高。但是,与FSPed和基础材料相比,复合材料的伸长百分比降低了。钻孔实验的机加工研究表明,与复合材料和基础材料相比,FSPed Al5083的切削力更高。这些结果表明,石墨烯的存在可作为固体润滑剂,从而增加了可加工性并降低了钻孔过程中的切削力。通过电化学研究评估的腐蚀行为表明,与FSPed合金相比,复合材料的耐蚀性降低,但与基础材料相比则略有改善。结果表明,Al5083-石墨烯复合材料具有改善的机械性能和更好的切削性。然而,在通过FSP开发Al5083-石墨烯复合材料时,必须考虑到劣化的耐腐蚀性。

更新日期:2020-10-11
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