Fabrication and Investigation of the effect of Machining Parameters on the Performance of Machining Al-TiB2 Composites
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Date
2023-01
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Addis Ababa University
Abstract
Aluminum-based metal matrix composite materials are mostly used to design automobile parts and aircraft structures due to their lightweight and high strength. In this study, the stir casting method was used for the fabrication because it is the most effective method for manufacturing metal matrix composites due to its more effective and fairly uniform distribution. Machining of metal matrix composites was difficult in the turning process. This study investigates optimum cutting parameters for turning Al 6061- 10% TiB2 composite materials.
The mechanical properties of Al-10% TiB2 composite were analyzed using the following tests: tensile test, hardness, and impact test. Al 6061- 10% TiB2 has a mechanical property i.e. tensile test the maximum result from the specimens was 242MPa but the average was (208MPa), hardness test by Rockwell hardness test the average result was (74.9HRH), and finally the Impact result was (311.67KJ/m2).
The study considered the cutting parameters which are the cutting speed, depth of cut, and feed rate as input, surface roughness and material removal rate are the responses by using coated carbide tool on a CNC lathe machine. The effect of cutting parameters on Surface roughness and material removal rate were studied and analyzed. Experiments were conducted based on the Taguchi design of Experiments with orthogonal array L9, and the optimization of the results works with Analysis of Variance (ANOVA).
The optimum responses of MRR and surface roughness were obtained at high cutting speed 1500rpm, high depth of cut 1.5mm, and medium feed rate 100mm/min.
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Keywords
Aluminum 6061, Titanium boride, Stir casting, Microstructure, Surface roughness, Material removal Rate and ANOVA