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All Journal AUSTENIT Machine : Jurnal Teknik Mesin Jurnal Inovator JURNAL CRANKSHAFT MACHINERY: Jurnal Teknologi Terapan International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
Sampurno, Rachmat Dwi
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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KARAKTERISTIK PERMUKAAN PATAH DAN KETAHANAN LELAH PADA MATERIAL BEJANA TEKAN BAJA ASTM A36 Azhari, Ikbal; Chandra, Hendri; Homzah, Ozkar F.; Ramadhoni, Tri Satya; Sampurno, Rachmat Dwi
AUSTENIT Vol. 16 No. 1 (2024): AUSTENIT: April 2024
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v16i1.7219

Abstract

Pressure vessels are equipment in the industrial field to hold pressurized fluids, such as gas, oil and chemicals, ASTM A36 steel is one type of material that can be used in pressure vessels, this steel has good mechanical properties but still has limitations in its fatigue resistance. Pressure vessels receive internal and external loads, this pressure difference results in stress on the wall (shell). This stress can cause material damage, therefore the author conducted fatigue repeated bending and Scanning electron microscopy (SEM) testing to analyze fatigue resistance and fracture surface characteristics. Fatigue testing of 4 specimens with angle variations of 4Ëš, 8Ëš, 11Ëš and 13Ëš resulted in a cycle count of 1490200 cycles, 400050 cycles, 234200 cycles and 99000 cycles respectively. SEM results of the fracture surface of the 4Ëš and 13Ëš testing angles of ASTM A36 steel showed striation and microvoid coalescence and crack propagation indicating that the fatigue failure that occurred was ductile fracture. Based on the conclusions obtained, it shows that the number of cycles is influenced by the testing stress, which means that at high stresses, the life time of the pressure vessel will be smaller and vice versa.
OPTIMIZATION ROUGHNESS LEVEL OF TURNING FROM ALUMINUM SCRAP SMELTING RESULT USING SAND CASTING METHOD Gunawan, Indra; Muarif, M. Awal; Fadilah, Muhammad Arif; Sani, Almadora Anwar; Sampurno, Rachmat Dwi; Apandi, Khairul; Achva, RA. Jihan Ulima; Ayuni, Riski
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.7590

Abstract

The Production Machinery Workshop at the Sriwijaya State Polytechnic are producing a lot of aluminum scrap left over from turning, where this waste is still thrown away. This will cause pollution to the environment and will be detrimental to the Sriwijaya State Polytechnic workshop. Casting is one way to deal with aluminum scrap, scrap be melted and then reshaped into a practical material that can be reused. The use of sand as a printing medium in recycling scrolls is not recommended because it is less effective and efficient in terms of long-term use. After research has been carried out, the resulting aluminum shaving waste can be reused as practical material provided that the shavings must be separated from other waste such as iron and steel. In the optimization process, the best value is obtained at the spindle speed factor of 900 rpm (A1), then the feeding depth at 0.5 mm (B1), and the feeding speed at 0.08 mm/put.  
Co-Authors Achva, RA. Jihan Ulima Alexander, Willy Alimedi, Alimedi Anwar, Zainuri Apandi, Khairul Arnoldi, Dwi Ayuni, Riski Azhari, Ikbal Dodi Tafrant Effendi, Sairul Fadilah, Muhammad Arif Fitriani, Devita Dinda Gumay, Muhammad Fadel Hendradinata, Hendradinata Hendri Chandra Hidayat, Randy HIDAYATI, BAITI Imam Akbar, Imam Indra Gunawan Ismail, Iskandar Karmin Karmin, Karmin Khoirullah, Ananda Thomas Lily Rahmawati, Lily Muarif, M. Awal Mulyadi Mulyadi Muzafar, M. Agil Okviyanto, Toni Ozkar F. Homzah, Ozkar F. Pangestu, Wahyu Adjie Paramadhony Putri, Fenoria Rachman, Fadhiil Fuad Ramadhan, Surya Ramadhoni, Tri Satya Rasid, Muhammad Rifa'i, Ahmad Imam Safei Safei Sailon, Sailon Sani, Almadora A. Sani, Almadora Anwar Setiati, Tri Woro Sumarna, Herlin Sundari, Ella Suryana, Didi Syamsul Rizal Tafrant, Dodi Turnip, Parngongo Utama, Kodri Hudiya Utami, Ogi Meita Yuliandi, Rizky Brillian