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All Journal Jurnal Teknik Mesin Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Panrita Abdi - Jurnal Pengabdian pada Masyarakat CARADDE: Jurnal Pengabdian Kepada Masyarakat Jurnal Serambi Engineering Industrial Engineering Journal (IEJ) Jurnal Pengabdian Kepada Masyarakat (Mediteg) Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Vokasi Journal of Welding Technology Jurnal Bakti Masyarakat Indonesia Jurnal Teknologi Jurnal Teknologi Kimia Unimal Jurnal Polimesin Serambi Engineering Jurnal Mesin Sains Terapan Disaster in Civil Engineering and Architecture
Indra Mawardi
Jurusan Teknik Mesin Politeknik Negeri Lhokseumawe
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : Journal of Welding Technology

 1 
Analysis of Defects in SMAW Welding Joint Using E 7016 Electrode Due to the Direct Cooling Process Aljufri Aljufri; Indra Mawardi
Journal of Welding Technology Vol 4, No 2 (2022): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v4i2.3304

Abstract

Welding defects in a construction if repairs are not immediately carried out, then in the weld defect area can cause cracks that are aggravated by wider cracking and corrosion so that it can cause brittle fractures to the detriment. The problem with brittle fracture is a big problem in steel that has been welded, especially in welded joints, this brittle fracture becomes more important due to the factors of voltage concentration, inappropriate structure and defects in the weld, the purpose of this study: to find out how to use suitable electrodes for ST 37 material in the welding process, whose cooling process directly uses Oil and water (Direct Colling Process),  and to obtain optimal welding results after going through the results of welding defect examination using the Penetrant Test method, and the Maghnetic Particle Test.  From the results of the examination research conducted by the Welding Inspection team of PT. Superintending Company of Indonesia (SUCOFINDO) to 15 ST 37 specimens that have undergone welding does not show any welding defects, in the sense that they are still within the acceptable limit criteria (Acceptance Standard Ansi B 31.3), from the results of tensile testing On the use of different electrodes in the welding process of ST 37 material, shows that the ST 37 material whose welding process uses electrode E7016 welded results and tensile strength is better than the  ST 37 material which in the welding process uses electrodeS E 7018 with the cooling process using Oil and water
Influence of shielding gas flow on the TIG welding process using stainless steel 304 material Aljufri, Aljufri; Sofyan, Sofyan; Rizki, Muhammad Nuzan; Putra, Reza; Mawardi, Indra
Journal of Welding Technology Vol 6, No 1 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i1.5322

Abstract

A common issue encountered with main heat exchanger equipment is improper operation, which can lead to the development of cracks in the stainless-steel pipes. The welding process alters the metal microstructure in the heat-affected zone, thereby affecting the mechanical properties of the welded joint. To mitigate this issue, TIG welding with argon shielding gas is employed. This method helps prevent oxidation and ensures the formation of a stable welding arc in 304 stainless steel, which is renowned for its excellent mechanical properties and corrosion resistance. The objective of this study is to evaluate the impact of variations in shielding gas flow on the mechanical properties of 304 stainless steel plates during the TIG welding process. The aim is to determine the optimal settings for producing robust and long-lasting welded joints. To assess the hardness of the welded joints, we employed a Brinell-type Hardness Tester FB-3000LC machine. A Brinell steel ball indenter measuring 5 mm on the HBW scale and applying a load of 125 Kgf was utilized. At a protective gas flow rate of 8 L/min, the average tensile stress was 44.72 N/mm², strain was 0.177, modulus of elasticity was 2518 MPa, and hardness was 99.712 HBW. Increasing the gas flow rate to 13 L/min resulted in an average tensile stress of 47.50 N/mm², strain of 0.189, elastic modulus of 2525 MPa, and hardness of 105.522 HBW. Further increasing the gas flow rate to 18 L/min led to an average tensile stress of 49.69 N/mm², strain of 0.192, modulus of elasticity of 2597 MPa, and hardness of 106.704 HBW. Based on the research findings, it was observed that the weld area exhibited an increase in hardness values due to the heat generated during the welding process. The use of protective gas flow during welding is deemed effective in producing well-formed welded joints, as it prevents fractures from occurring within the weld area during the tensile test process. The choice of protective gas is determined by the dimensions of the material plate.
Co-Authors - Hanif - Ramli A. Jannifar Abdel Peudada Alfonso, Ali Umar Aljufri Aljufri aljufri aljufri, aljufri Amalia, Ismi Amir D Amir Rizal Andreas Andreas Andreas Andreas Arhami, Muhammad Ariefin Ariefin Ariefin Ariefin Azwar Yunus Darmein Darmein Dwi Saifullah Fakhriza - Faurantia, Faurantia Franky Franky Guntur Syahputra Haiyum, Muhd Hamdani Hamdani Hamdani, Hamdani Hamzah, Ahmad Mujahid Hanif Hanif Hanif Hanif Hanif Hanif Hanif, Hanif Hasanuddin, Iskandar Hashim, Mohd Hazree Hasrin Hasrin Indrawati Indrawati Irwin Syahri Cebro Junaidi Junaidi Khairol Mizan Us M. Faisal Mawardi Mawardi Mior Sani, Wan Noor Hin Misran Misran Muhammad Hatta Muhammad Muhammad Muhammad Riphaldi Muntasir, Muntasir Muzammir Muzammir Nahar Nahar Nahar, Nahar Nur, Faisal Muhammad Nurdin Nurdin Nurdin Nurdin Nurlaili Nurlaili Putra, Reza Rizal, Samsul Rogo, Kabiru Usman Safaruddin Saifuddin . Saifuddin Saifuddin Samsul Bahri Samsul Bahri Samsul Bahri Sariyusda, Sariyusda Seiba, Sandradilla Yohana Sofyan Sofyan Sri Aprilia Syamsiar, Syamsiar Taufik Taufik Turmizi, Turmizi Yacoob, Haryati Yuniati, Yuniati Zainal Abidin Zainal Abidin Zaini Zaini AK ZAINI AK ZAINI AK Zuhaimi Zuhaimi Zuhaimi Zuhaimi Zul Saputra Zulkarnaini Zulkarnaini Zulkifli Zulkifli