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All Journal Traksi : Majalah Ilmiah Teknik Mesin Jurnal Teknoin TEKNIK Rotasi Jurnal Ilmu Lingkungan JURNAL TEKNIK MESIN Jurnal Simetris Media Mesin: Majalah Teknik Mesin Jurnal Rekayasa Mesin JMPM (Jurnal Material dan Proses Manufaktur) Journal of Energy, Mechanical, Material and Manufacturing Engineering Mesin Jurnal Metalurgi dan Material Indonesia JURNAL CRANKSHAFT Jurnal Teknik Mesin Indonesia Mekanika: Majalah Ilmiah Mekanika Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Eksergi: Jurnal Teknik Energi SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan) Jurnal Profesi Insinyur Indonesia Jurnal Sosial Ekonomi Perikanan Jurnal Polimesin Journal of Engineering and Technological Sciences
Agus Suprihanto
Mechanical Engineering Departement Diponegoro University Semarang - Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Transportation

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Optimisation of Preheating Temperature for Mechanical Performance of SMAW Welded ASTM A36 Steel Sumarji, Sumarji; Hariyanto, Agus; Wahyudianto, FX. Arif; Suprihanto, Agus
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7356

Abstract

The Shielded Metal Arc Welding (SMAW) process applied to ASTM A36 structural steel generates thermal cycles that influence the mechanical behaviour of welded joints. This study investigates the effect of preheating temperature on tensile properties and hardness distribution of SMAW-welded ASTM A36 steel plates with a thickness of 10 mm. Preheating temperatures of none, 150 °C, 250 °C, and 350 °C were applied prior to welding in the 1G position using AWS A5.1 E7016 and E7018 electrodes. Tensile testing was conducted according to ASTM E8, while Vickers hardness measurements were performed across the base metal (BM), heat-affected zone (HAZ), and weld metal (WM). The results show a consistent hardness distribution of WM > HAZ > BM for all preheating conditions, with average hardness values ranging from 190–210 HV in the WM, 179–186 HV in the HAZ, and 164–173 HV in the BM. The yield strength increased from 301.69 MPa (without preheating) to 315.68 MPa at 250 °C, followed by a decrease to 298.70 MPa at 350 °C, which is associated with microstructural softening. In contrast, the ultimate tensile strength remained relatively stable within the range of 443–446 MPa. Based on these results, preheating at 250 °C tends to provide a more homogeneous hardness distribution and higher yield strength, suggesting a more favourable thermal condition for improving the mechanical performance of SMAW-welded ASTM A36 steel. .
Thermal distribution and macrostructural characteristics of TIG-welded Cu/SS316L dissimilar joints: experimental and numerical study Azwinur, Azwinur; Suprihanto, Agus; Kusuma, Mukhsinun Hadi; Rozi, Khoiri; Usman, Usman; Dharma, Surya; Hamdani, Hamdani
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.7838

Abstract

Dissimilar welding of copper (Cu) and Stainless Steel 316L (SS316L) presents significant challenges due to their large differences in thermal conductivity and melting temperature, which lead to asymmetric heat distribution and non-uniform penetration. This study aims to evaluate the effect of welding current on temperature distribution and macrostructural characteristics of TIG-welded Cu/SS316L joints using ERCuSi-A filler through an integrated experimental and numerical approach. Welding experiments were conducted at three current levels: 120 A, 135 A, and 150 A on 2.7 mm thick plates. Macrostructural examinations were performed to assess weld bead geometry and penetration behavior. Transient thermal simulations were carried out using ANSYS Workbench to predict temperature fields and thermal gradients. The results indicate that welding current significantly influences weld morphology and thermal behavior. At 120 A, the weld bead was relatively narrow with limited penetration on the Cu side due to rapid heat dissipation. At 135 A, a more uniform fusion profile was achieved, with simulated peak temperatures exceeding 1000°C and an improved penetration balance between Cu and SS316L. At 150 A, deeper penetration into SS316L was observed; however, the heating cycle became shorter and the temperature distribution more localized. Numerical results consistently showed asymmetric temperature fields, where heat diffused rapidly into Cu and concentrated in SS316L. The strong correlation between simulation and macrostructural observations confirms that thermal distribution governs weld geometry and penetration behavior. The 135 A current provides the most balanced fusion characteristics, making it suitable for Cu/SS316L dissimilar joints in heat-transfer applications.
Co-Authors . Widayat Abdul Muis Achmad Widodo Adriathma, Abduh Bayu Agus Hariyanto Ako, Henry Al Azis, Bimasakti Sulthan Anak Agung Gede Sugianthara Andhika Krismaintya Putera Andika Pradifan Andrew Bryano Kermite, Andrew Bryano Andri Cahyo Kumoro Aries Susanty Azwinur Azwinur Basyith, Mohammad Rizqi Abdul Berlin, Rilo Budi Setyana Butarbutar, Martin Canggih Nugroho Catur Pramono Dianto, Wahyu Djoeli Satrijo Djoeli Satrijo Dwi Basuki Wibowo Dwi Basuki Wibowo Eko Surojo Eko Surojo Faisal Yusuf Tornado Ferry Hermawan Gunawan Dwi Haryadi H Hadiyanto Hamdani Hamdani Hanif, Dimas Naufal Hanifa, Kana Harianto Harianto Hasan Basri Henri Fatih Wibowo Ian Yulianti IGN Wiratmaja Puja Imam Imam Indrawan, Harry Ismoyo Haryanto Jericho Jericho Kamta Kamta Khoiri Rozi Khoiri Rozi Kusuma, Mukhsinun Hadi Miftachul Munir Mika Patayang, Mika Muhammad Fajar Purnama Muhammad Fakhri Aji Pratomo Nugraha, Ariyana Dwiputra Nur Aziyah Nur Cahyo Nur, Hairan Ojo Kurdi P Wahyudi Parven, Parven Paryanto, P Prakoso, Ivan Setyo Pratomo, Muhammad Fakhri Aji Purbonugroho, Hanindhieto Dias Andra R Rizal Isnanto Reza, Reza Rochim Suratman Rosadi, Muhammad Arief Rusman Rusman Setyawan Bekti Wibowo Sianipar, Daniel Sigit Iswahyudi Siti Aisyah Soesanto, Indra Harfani Sukamta Sukamta Sulardjaka Sulardjaka Sulardjaka, S Sumardi . Sumarji Surya Dharma Susilo Adi Widyanto Sutopo, Farrel Rico Alifta Suyitno Suyitno Teguh Triyono Tomy Satya Usman Usman Wahyudianto, FX. Arif Waruwu, Kezia Gracelynn Wijaya, Elang Pramudya Yatim, Ardiyansyah Saad Yurianto Yurianto Yusuf Umardani Yusuf Umardhani