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Analisis Cacat Las SMAW dengan Elektroda Berbeda Posisi 2G pada Baja ST 37 Metode FTA Assagaf, Iman Pradana A; Ariyanto, Ariyanto; Prasetyo, Angger Bagus; Fitrah, Muhammad Aqdar
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.334

Abstract

This study aims to analyze the types and causes of welding defects that occur during Shielded Metal Arc Welding (SMAW) using different electrodes in the 2G position on ST 37 steel. The research was conducted by students of the Diploma III Industrial Agro-Manufacturing Engineering Study Program at Politeknik ATI Makassar using both qualitative and quantitative approaches. A total of 10 welded samples were visually examined and tested using the liquid penetrant method to detect surface defects. The analysis employed the Fault Tree Analysis (FTA) method with a deductive approach to identify the top events representing major defect types, trace their root causes through the fault tree structure using AND and OR logic gates, and analyze the relationships among contributing factors. The results revealed five dominant defect types—spatter, stop-start, surface undercut, root concavity, and blow hole—which accounted for 61.7% of all detected defects. These defects were primarily caused by technical factors, including unstable arc control, improper welding angles and travel speeds, and poor cleanliness of electrodes and materials. Other defects, including root undercut, cold lap, excessive penetration, pin hole, and porosity, also affected weld quality. Based on the FTA findings, corrective actions were recommended, including operator retraining, proper parameter adjustment, equipment maintenance, and enhanced supervision to improve overall weld quality.
Co-Authors . Asparian, . A Assagaf, Iman Pradana Achmad, Anshar Adam Maulana Adiansyah, Joni Ahmad Luthfi Ahmad Rifai Rahawarin Ahmad, Asmida Ahmat Wakit Aisyah, Ratu Alhadar, Nabila Islamaiya Alpiana, Alpiana Alwi, Rahmat Ambar Lukitaningsih Aminullah, Agus Andicha Gustra Jeki Andreas Pekey, Andreas Anwar Efendy Apiana, Apiana Aqdar Fitrah, Muhammad Ariel, Ariel Arif Wijaya Arifin, Abdul Nasser Arwansyah , Rifki Asfi, Nur’ Adilla Assagaf, Iman Pradana A Aswin, Fajar Azhari, M. Ari Azima, Nur Benthony, Frans Robert Chandra, Filius Daffa, Muhammad Dewi, Gustina Kusuma Dharta, Yuli Dwi Kartika Pebrianti Efni, Nel Eko Yudo Erni Yustissiani Erwansyah, Erwansyah Erwanto Eva Banowati Fajriah, Azkia Nurul Fakhrul Rozi Yamali Feriadi, Indra Fitri, Hidayati Fitria, Mayzara Sari Fitriawa, Erwin Rangga Fitriawan, Erwin Rangga Fredy, Gloriana Nanni Dau Ganesha L Putra Gani, Najamuddin Gusti, Chandra Sanima Adi Hady Rasikhun Halim Halim, Halim Hamid, Moh. Amin Hamid, Muhammad Amin Harahap, Pahruddin Hari Siswanto Harianja, Naomi Fasca Sari Harsono, Abimanyu Harwadi, Harwadi Helfi Rahmawati Henny Welsa Hesty, Hesty Husman Husman Husni, Ibrahim Ichchan Adjury Essarofy Imam Mawardi Indrawati, Iin Istianingsih, Nanik Iswahyu Pranawukir Jamaludin Ghafur, Jamaludin Jati, Sigit Pramono Johari, Harry Julianto, Muhamad Farrel Julniyah, Lainnatu Kamala Syartina Khotibul Umam Kusuma, Ratu Latif, Arman M Rivai M Riva’i Masdani Masdani Masdani, Masdani Matrani, Bedy Matrani, Bedy Fara Aga Meidiantara , Muhammad Rizki Mila Triana Sari Molano, Steanly Muh. Nurul Haq Amaluddin Muliatiningsih Muliatiningsih Muri, Dewi Padusi Daeng Musa, Abdul Haris Muslim Muslim Nicola, Adyu Arya Nugraha, Aldi Nugraha, Amelia Oktafia Nurfitriani Nurfitriani, Nurfitriani Nurhadi, Irvan Nurhayati, Nurhayati Nurhikmah, Ulfiah Nurizka, Zalsyafina Nurkumala, Novita Arum Nurul Hidayati Oktaviana, Putri Amalia Ongki Rio Irfany Opur, Hamka George Marly Hairil Osrita Hapsara Palahuddin, Palahuddin Pangaribuan, Rapmaida Megawaty Pasau, Kristiana Pebriani, Diffa Prasetyo, Angger Bagus Pujiati , Herni puspitaningrum, Jayanti Putra perdana guna darma Putra, Dika Septayama Qomaruddin, Mochammad Rafly, Rafly Rahatabuana, Lalu Wikhu Rahmawati, Helfi Rahmawati, Sustania Rahmi, Yesika Novita Ridho Syahputra, Muhamad Robert Napitupulu Ryendra, Nadya Restu salamah salamah Salu, Salma Saputra, Aldi Yusuf Saputri, Intan Rahmadani Saputri, Lulu Kartika Saputro, Yayan Adi Sateria, Angga Saud, Oshlifin Rucmana Silmi, Hayatus Siti Fati Hatussaadah Soewongsono, Junita Christine Subando, Joko - Sugiyarto Sugiyarto Sukarman Sukarman Sukristin Sukristin, Sukristin Sukuryadi, Sukuryadi Sulfiana, Enni Suluh, Sallolo Supit, Tesalonica Maria Susila, Dwi Agus Susriyanti, Susriyanti Suzen, Zaldy Sirwansyah Tarigan, Lilis BR Tina Yuli Fatmawati Tranggono, Emiral Rangga Tuparjono . vergo banarma Widia Sri Utami Widia Wati, Widia Yacobus, Romi Yanti, Rahmi Dwi Yenny Febrianty Yesni, Marnila Yosep Ruslim Yudiarta, Eka Yuli Dharta Yuliana Yuliana Yunita, Masna Zaldy Kurniawan Zulfitriyanto, Zulfitriyanto