PENGARUH PARAMETER PROSES WIRE ARC ADDITIVE MANUFACTURING (WAAM) TERHADAP GEOMETRI BUTIR LAS TUNGGAL ER5356
Abstrak
Penelitian ini menginvestigasi pengaruh parameter cetak WAAM pada geometri butir las tunggal dengan elektroda aluminium ER5356 berdiameter 1,0 mm. Parameter yang divariasikan pada penelitian ini antara lain Tegangan, Arus dan Feedrate masing-masing sebesar 18 V, 22 V, 26 V; 100 A, 140 A, 180 A; 500 mm/menit, 750 mm/menit dan 1000 mm/menit. Proses pencetakan spesimen menghasilkan butir las discontinuous dan continuous. Spesimen continuous dengan geometri butir las yang konsisten mempunyai Heat Input (HI) pada rentang 0,17 kJ/min hingga 0,43 kJ/min. HI pengelasan menghasilkan pengaruh positif ketika tegangan yang digunakan relatif rendah (18 V) dan arus tinggi (180 A). Peningkatan tegangan tidak berpengaruh secara signifikan pada pembentukan butir las yang konsisten. Pengaturan arus tinggi dan tegangan rendah menghasilkan butir las yang lebih konsisten bila dibandingkan dengan kombinasi arus tinggi dan tegangan tinggi. Sementara itu, feedrate berkontribusi pada pembentukan geometri butir las. Semakin tinggi feedrate, lebar dan tinggi butir las cenderung mengalami penurunan. Lebar dan tinggi layer minimum yang dihasilkan dari proses pencetakan adalah 6,723/1,364 mm melalui pengaturan parameter 22 V, 140 A, dan 1000 mm/min. Sedangkan lebar dan tinggi layer terbesar dihasilkan oleh pengaturan parameter 26 V, 180A, dan 500 mm/min dengan nilai lebar dan tinggi layer 14,293/2,8 mm.
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