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ANALYSIS OF TENSILE STRENGTH AND MACRO STRUCTURE OF 6061 ALUMINUM ALLOY RESULTING FROM GMAW AND GTAW WELDING Salahudin, Xander; Waluyo, Edi; Hastuti, Sri
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Aluminium 6061 material is often used in the shipbuilding industry, especially as a construction frame on ships. GMAW (Gas Metal Arc Welding) and GTAW (Gas Tungsten Arc Welding) are widely used in welding aluminium alloy materials. This research aims to determine and analyse the effect of V, X, and U groove variations welded using GMAW and GTAW on tensile strength of a 6061 aluminium alloy. The results of this study obtained the highest tensile stress value from the X groove GMAW welding of 149.22 MPa with a strain of 8.60%. The lowest tensile stress value was obtained from the U groove GTAW welding of 105.09 MPa with a strain of 3.18%. In general, the tensile strength value of GMAW welding is better than GTAW welding. Macro photo observations of GMAW welding show a small amount of porosity welding defects at the base of the weld, while GTAW welding shows a more amount of porosity welding defects at the base of the weld.
The Effect of Clay Tile Particle Addition on the Flame Retardancy and Impact Toughness of Ramie Fiber-Reinforced Polypropylene Composites Gibrail, Muhammad; Hastuti, Sri; Listyanda, R. Faiz; Saputra, Eko; Nugroho, Wahyu; Putri, Farika Tono; Indrawati, Ragil Tri; Salahudin, Xander
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.v21i1.7458

Abstract

Environmental concerns regarding polypropylene (PP) plastic waste have driven the demand for more sustainable alternative materials through composite development. This study aims to analyze the effect of adding Sokka roof tile particles as a filler on the flame retardancy and impact toughness of ramie fiber-reinforced composites. The composite materials utilize a polypropylene matrix, ramie fiber reinforcement, and Sokka roof tile particles as filler with concentration variations of 2%, 4%, and 6%. The results demonstrate that increasing the filler volume significantly improves the material's flame-retardant properties, with the 6% variation achieving the best thermal performance and the lowest burn rate of 214.27 mm/min. However, in terms of mechanical properties, a decline in impact toughness was observed as the filler content increased; the average energy absorption dropped from 1.075 Joules at 2% concentration to 0.735 Joules at 6%, which is consistent with the decrease in impact strength from 0.0364 J/mm² to 0.0204 J/mm². This phenomenon indicates that while inorganic particles effectively serve as a thermal barrier, excessively high concentrations increase material brittleness, thereby reducing the impact energy absorption capacity. In conclusion, a 6% concentration of Sokka roof tile particles is recommended for applications prioritizing fire safety, while considering the compromise in mechanical strength.
Co-Authors Abdul Rahman Wahid Aris Priyatmoko Aris Priyatmoko Aris Priyatmoko Azam Akmal Nur Irsan Azhari, Fadhlan Azhari, Fadlan Aziz , Syahrul Fatchul Bagas Dwi Prakoso Bagus Saputra Bintoro, Sefrian Rizki Catur Pramono Crodita Bangkit Wiranegara Danang Henri Wibowo Danang Henri Wibowo Dullah, Muhammad Firdaus Ubai Edi Handoyo Edi Waluyo Eko Saputra Eko Saputra El Vionna Laellyn Nurul Fatich El Vionna Laellyn Nurul Fatich Endang Mawarsih Erics Kharisma Danang Perdana Fathoni, Achmad Luthfian Fuad Hilmy Gibrail, Muhammad Gilang Fitra Sanubari Gito Sugiyanto Hasugian, Panca Putra Hendri Setiawan Hidayat, Ilyas Ibnu Suseno Ida Ayu Putu Sri Widnyani Ihsan Hadi Nugroho Ikhsan, Ivan Hardi Nurul Indrawati, Ragil Tri Isro Nurul Hadi Kun Suharno Kun Suharno Laksono Trisnantoro Listyanda, R. Faiz M Rozak Ardiyanto M. Yogi Riyantama Isjoni Mahdi, Jausyan Al Margi Luhur, Galih Maulana Miftahkul Khoir Miftahkul Khoir Moh. Ibah Alfauzi Muhamad Agung Prasetyo Muhammad Cahya Wicaksana Muhammad Hasan Zuhdi Nani dkk. Mulyaningsih Naufal Widiyatama Aslam Nurdin, Akhmad Paryanto Pratama, Hidayat Putri, Ericha Dwi Wahyu Syah Putri, Farika Tono Rachman Satya Pamungkas Rachman Satya Pamungkas Rahayu, Yunita Raka Mahendra Sulistiyo Ranny Puspita Dewi Ridwan Afandi Rizki Dwi Ardika Ryantika Dyah Safitri Salim, Muhammad Faiz Samodro, Tegar Solly Aryza Sri Hastuti Sri Hastuti Sri Widodo Sri Widodo Sri Widodo Sri Widodo Sri Widodo Sri Widodo Sulistyo, Raka Mahendra Taufik, Ikhwan Tegar Adi Prabowo Tegar Armanto Trisma Jaya Saputra Wahyu Isti Nugroho Wahyu Nugroho Yudhistira, Dida Ardito Yusril Ihza Yusuf Satrio Wibowo Zainab Luxfi’i