ANALISA PENGARUH ARUS PENGELASAN ALUMINIUM MENGGUNAKAN METODE PENGELASAN TIG DENGAN ELEKTRODA ER4043 TERHADAP SIFAT MEKANIK
Analysis Of The Effect Of Aluminum Welding Current Using The Tig Welding Method With Er4043 Electrode On Mechanical Properties
DOI:
https://doi.org/10.46964/mjibtm.v19i1.1829Keywords:
TIG Welding, Aluminium, Welding CurrentAbstract
Penelitian ini bertujuan untuk menganalisis pengaruh variasi arus pengelasan dalam proses pengelasan TIG terhadap sifat mekanik sambungan aluminium Seri 3 yang digunakan dalam aplikasi radiator. Proses pengelasan dilakukan dengan menggunakan tiga tingkat arus yang berbeda: 115 A, 120 A, dan 125 A. Pengujian tersebut meliputi pengujian tarik, pengujian kekerasan Vickers, dan analisis mikrostruktural menggunakan mikroskop optik dan perangkat lunak ImageJ. Hasil uji tarik menunjukkan bahwa peningkatan arus pengelasan umumnya menyebabkan kekuatan tarik yang lebih tinggi tetapi mengurangi keuletan. Uji kekerasan mengungkapkan bahwa zona las memiliki kekerasan tertinggi dibandingkan dengan HAZ dan logam dasar. Pengamatan mikrostruktur menunjukkan perubahan signifikan dalam ukuran butir dan distribusi unsur di setiap zona karena variasi arus pengelasan. Secara keseluruhan, arus 125 A menghasilkan kekuatan tarik tertinggi, meskipun menghasilkan keuletan yang lebih rendah. Temuan ini memberikan wawasan berharga dalam menentukan parameter pengelasan yang optimal untuk menghasilkan sambungan yang kuat dan berkualitas tinggi, terutama dalam pembuatan radiator
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