Article Per Year (5 Year)
p-Index From 2020 - 2025
0.61
P-Index
This Author published in this journals
All Journal Jurnal Pengabdian Masyarakat Charitas Cylinder : Jurnal Ilmiah Teknik Mesin
Widiarto, Sandra Octaviani B.
Unknown Affiliation
Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Friction Stir Welding pada Paduan Aluminium 6061 dan HDPE menggunakan Mesin Frais Basuki, Widodo Widjaja; Ginting, Eliata Dumar; Hudaya, Hoo Bram Natanael; Sutanto, Hadi; De Fretes, Anthon; Widiarto, Sandra Octaviani B.
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 10 No 1 (2024): APRIL 2024
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v10i1.5497

Abstract

Friction stir welding (FSW) is a solid-state welding method that is very simple, cheap, and in principle only requires equipment to rotate the tool and move the workpiece translationally. In this research, it was demonstrated that the FSW process of aluminum alloy 6061 and high-density polyethylene (HDPE) polymer is possible using a vertical milling machine, however, modifications need to be made to make it possible to regulate the pressure applied by the milling machine through the tool shoulder to the surface of the workpiece. Apart from that, it was also known that for each material undergoing the FSW process, it is necessary to determine the right parameter set which is a combination of rotational speed and tool feed speed to obtain optimal welding results. Too high a tool rotation speed can cause high lifting forces which can produce large porosity in the workpiece. For the HDPE FSW process, too high a tool rotation speed, which is not balanced with the increase in feed speed will provide excessive heat, causing depressions on the surface of the nugget zone.
Tata Letak dan Penerangan Lampu Tenaga Surya Pada Panti Kemah Peduli Sahabat Kasih Hidayat, Trifenaus Prabu; Sugioko, Andre; Widiarto, Sandra Octaviani B.; Nur, Tajuddin
Jurnal Pengabdian Masyarakat Charitas Vol. 4 No. 02 (2024): Jurnal Pengabdian Masyarakat Charitas
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v4i02.6020

Abstract

Kemah Peduli Sahabat Kasih is a shelter for ODGJ (people with mental disorders) managed by one family. This shelter is located at Jl. Kp. Cicayur Kebun Manggu No.21, RW.1, Cisauk, Tangerang, Banten. In its operational activities, this shelter does not yet have adequate lighting. One of the facilities, precisely on the access road to the shelter, is inadequate. In addition, the lighting facilities in the front and back yards are also inadequate. Therefore, the purpose of creating lighting facilities on the access road to the shelter is to make it easier to get to the shelter, especially to provide lighting around the shelter so that nighttime operational activities are not hampered. The existence of lighting facilities on the access road to the shelter and lighting in the front and back yards is one of the important things to ensure security and safety in supporting nighttime operational activities safely and comfortably. The community service activity of utilizing solar energy in public street lighting as a replacement for conventional energy in Cisauk has gone well. This is supported by the results of the trial of the lights being able to be turned on and off, and the results of the interview gave a good activity score.
Pengaruh Energi Input Micro-Plasma Arc Welding Terhadap Struktur Mikro dan Sifat Mekanik Sambungan Baja DIN 2311 Yota, Richard Shan; Manalu, Ferry Rippun Gideon; Widiarto, Sandra Octaviani B.; Basuki, Widodo Widjaja
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 11 No 2 (2025): Oktober 2025
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v11i2.7366

Abstract

Molds are important components in the plastic injection molding processes. Even though molds are generally made of strong and heat-resistant steel, but when used repeatedly and continuously, the mold will also experience damage such as scratches and dents caused by dynamic thermal and mechanical loading. Making new molds requires very high costs. Mold repairs using traditional welding such as laser welding and Tungsten Inert Gas welding, apart from requiring relatively high costs, also require sophisticated skills. This problem can be overcome with Micro-Plasma Arc Welding (MPAW). With this welding method, the process of melting the material and filler is concentrated at one point which prevents the spread of excess heat to the parent material. Welding on DIN 2311 low alloy steel, which is often chosen as a plastic molding material, was carried out with weld energies of 120, 132 and 144 J. The welding results were tested to determine the microstructure evolution, hardness distribution and strength values ​​of each specimen. From the test results of materials processed through MPAW, it can be concluded that the specimen produced with a weld energy of 132 J has the most optimal microstructure and hardness distribution so that it can have strength equivalent to the strength of the original material before welding, with relatively high ductility as proven by its ability to perform plastic deformation of 7.8% or just 3.2% lower than the ability of the original material.
Co-Authors Anthon de Fretes, Anthon de Fretes Basuki, Widodo Widjaja Ferry Rippun Gideon Manalu, Ferry Rippun Gideon Ginting, Eliata Dumar Hadi Sutanto Hudaya, Hoo Bram Natanael Nur, Tajuddin Sugioko, Andre Trifenaus Prabu Hidayat Yota, Richard Shan