Performance evaluation of different carbide inserts in turning of newly developed Al-12Si-0.1Sr alloy |
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Authors: | ? Bayraktar A P Hekimo?lu |
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Affiliation: | Recep Tayyip Erdo?an University, Faculty of Engineering and Architecture, Department of Mechanical Engineering, 53100 Rize, Turkey |
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Abstract: | An Al-12Si-0.1Sr alloy ingot was manufactured using a permanent mold casting technique. The microstructure and mechanical properties of this alloy were researched. Effects of different cutting conditions (cutting speed-V: 200 m/min, 300 m/min, and 400 m/min and feed rate-f: 0.05 mm/rev, 0.1 mm/rev, and 0.15 mm/rev) on the cutting force (F) and surface roughness (Ra) during machining using uncoated and physical vapor deposition- titanium aluminum nitride coated carbide inserts were also revealed. Microstructure of the alloys consists of α phase, intermetallic δ and Al4Sr phases, thin spherical eutectic, and irregular coarse-shaped primary silicon particles. Cutting force and surface roughness decreased with the increased cutting speed during turning with uncoated, and titanium aluminum nitride coated inserts while they increased feed rate. A built-up edge and built-up layer were formed in both cutting inserts. The built-up edge and built-up layer decreased with increasing cutting speed and increased feed rate. The cutting force, surface roughness, built-up edge, and built-up layer were lower in uncoated inserts compared to the titanium aluminum nitride coated inserts. |
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Keywords: | Al-12Si-0 1Sr alloy built-up edge built-up layer cutting force microstructure surface roughness Al-12Si-0 1Sr-Legierung Aufbauschicht Aufbauschneide Gefüge Oberflächenrauheit Schnittkraft |
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