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Evaluation of surface roughness in drilling particle-reinforced composites
Composites and Advanced Materials ( IF 2.4 ) Pub Date : 2020-07-06 , DOI: 10.1177/2633366x20937711
Ferit Ficici 1
Affiliation  

Aluminum matrix composite materials being used in different sectors including automobile, aerospace, defense, and medical and are currently displacing unreinforced materials with their superior mechanical properties. The metal removal process of drilling is widely used in many structural applications. This study experimentally investigates the drilling characteristics of silicon carbide (SiCp)-reinforced Al 7075 composites produced by stir casting method. Also, two different drill materials with high-speed steel (HSS) and titanium nitride (TiN)-coated HSS carry out in drilling operation. The effect of operational parameters such as cutting speed and feed rate and materials parameters such as weight fraction of reinforcement and cutting tools on the surface roughness of drilled holes were evaluated in the drilling operations. The results of the drilling test indicate that the feed rate and cutting speed have a very strong effect on the surface roughness of matrix alloy and composite materials. The surface roughness (Ra) values increased with increasing the feed rate and decreased with increasing the cutting speed. Under 0.10 mm/rev and 20 m/min drilling conditions and using HSS drill, surface roughness values for matrix, 5% SiC-, 10% SiC-, and 15% SiC-reinforced composites, were obtained 2.57, 2.59, 2.61, and 2.64 µm, respectively; besides, using TiN-coated HSS drill, surface roughness values were obtained 1.60, 1.63, 1.64, and 1.66 µm, respectively. An increase in the weight fraction of the abrasive SiC particle resulted in a very crucial deterioration quality of the drilled hole. TiN-coated HSS drills better performance exhibits than uncoated HSS drills for all the drilling operations about surface roughness properties. Short chip formations observed both the matrix alloy and the composite materials for two different drills in the drilling operations.



中文翻译:

钻孔颗粒增强复合材料的表面粗糙度评估

铝基复合材料被用于不同领域,包括汽车,航空航天,国防和医疗,目前正以其优异的机械性能取代未增强的材料。钻孔的金属去除工艺广泛用于许多结构应用中。这项研究通过实验研究了碳化硅(SiC p搅拌铸造法生产的)增强Al 7075复合材料。此外,在钻孔操作中还使用两种不同的带有高速钢(HSS)和氮化钛(TiN)涂层的高速钢的钻孔材料。在钻孔操作中,评估了诸如切削速度和进给速度之类的操作参数以及诸如钢筋和切削工具的重量比之类的材料参数对钻孔表面粗糙度的影响。钻孔试验结果表明,进给速度和切削速度对基体合金和复合材料的表面粗糙度有很大的影响。表面粗糙度(R a)值随着进给速度的增加而增加,而随着切削速度的增加而减小。在0.10 mm / rev和20 m / min的钻孔条件下,使用HSS钻孔,获得的基质,5%SiC-,10%SiC-和15%SiC增强复合材料的表面粗糙度值分别为2.57、2.59、2.61和分别为2.64 µm;此外,使用TiN涂层HSS钻头,表面粗糙度值分别为1.60、1.63、1.64和1.66 µm。磨料SiC颗粒的重量分数的增加导致钻孔的非常关键的劣化质量。在所有有关表面粗糙度特性的钻孔操作中,TiN涂层HSS钻的性能要优于未涂层HSS钻。短切屑形成在钻孔操作中观察到两种不同钻头的基体合金和复合材料。

更新日期:2020-07-07
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