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All Journal Journal of Automotive and Mechanical Applied Technology Journal of Applied Mechanical Engineering Innovation
Heri Wibowo
Universitas Negeri Yogyakarta, Indonesia
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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The Effect of Temperature and Pressure on Filling Time in the Injection Process of Shop Hanger Products Thedy Kristanto; Paryanto; Heri Wibowo
Journal of Applied Mechanical Engineering Innovation Volume 01, No. 02 October 2025
Publisher : Program Studi Sarjana Terapan Teknik Mesin, Fakultas Vokasi, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamei.v1i2.3011

Abstract

This study investigated the effect of melt temperature and injection pressure on filling time in the injection molding process for shop hanger products. The research used an experimental simulation method with Autodesk Moldflow Adviser 2023. The melt temperature was varied at 180, 190, 200, 210, and 220 °C, while injection pressure was varied at 20, 30, 40, and 50 MPa. Runner diameters of 2, 4, and 6 mm were also evaluated to determine the most suitable flow channel for the mold design. The results show that a 4 mm runner produced the shortest filling time among the runner variations. Increasing temperature and pressure tended to reduce filling time within the tested parameter range. The shortest filling time was obtained at a melt temperature of 220 °C and an injection pressure of 40 MPa with a 4 mm runner. Several defects, including short shot, warpage, weld lines, sink marks, and air traps, were detected during the simulation, but the defects were not significant under the optimal parameters. The mold was designed with a 330 × 350 mm mold base and a required clamping force of 470 kN. The selected injection machine available at CV. Mulus Teknik, a 90-ton UN90SKII machine with a clamping force of 900 kN, was suitable for production.
Analysis of Tensile and Bend Strength with Current and Voltage Variations in GMAW Welded Joints of SS400 Steel for Train Underframes Muhammad Fahrurozy Pradaya; Heri Wibowo
Journal of Applied Mechanical Engineering Innovation Volume 2, No. 01 April 2026
Publisher : Program Studi Sarjana Terapan Teknik Mesin, Fakultas Vokasi, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamei.v2i1.3348

Abstract

This study investigates the effect of welding current and voltage variations on the tensile and bend strength of Gas Metal Arc Welding (GMAW) joints in SS400 steel for train underframe applications. SS400 steel plates with a thickness of 4.5 mm were welded using a single-V groove with a 60° angle. The welding parameters consisted of two current levels, 100 A and 120 A, and three voltage levels, 20 V, 23 V, and 26 V. The research used a quantitative experimental method. The tensile test data were analyzed by calculating the average maximum tensile strength and elongation, while the bend test results were evaluated based on visual defects on the convex surface of the specimens. The results show that the 100 A-23 V parameter produced the highest average maximum tensile strength of approximately 458.3 MPa with an average elongation of 13.9%. However, the bend test results indicated that the safest and most acceptable parameter was 120 A with moderate voltage, particularly 23 V, because the specimens showed no visible defects after testing. Therefore, the 120 A-23 V welding parameter is considered the most optimal combination for balancing tensile strength and bend toughness in GMAW welded joints of SS400 steel for train underframe structures
Wire Arc Additive Manufacturing for Lightweight Material Applications: A Systematic Literature Review Agus Widyianto; Heri Wibowo; Riswan Dwi Djatmiko; Atik Setyani
Journal of Automotive and Mechanical Applied Technology Vol. 3 No. 1 (2026)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v3i1.3332

Abstract

Wire arc additive manufacturing (WAAM) is increasingly used to fabricate large lightweight metal components because it combines wire feedstock, arc-based heat sources, high deposition rate, and high material utilization. This systematic literature review evaluates recent progress in WAAM for aluminum, titanium, and magnesium alloys, with emphasis on process parameters, microstructure, mechanical properties, defects, and industrial applications. The review followed the PRISMA 2020 framework and searched three academic search platforms using six structured queries covering WAAM, lightweight alloys, process parameters, mechanical behavior, microstructure, defects, and applications. From 1,052 records, 305 duplicates were removed, 747 records were screened, 270 papers were assessed in full text, and 265 studies were included in the evidence synthesis. Aluminum alloys were the most frequently reported material system, particularly Al-Mg, Al-Si, Al-Cu, and Al-Zn-Mg-Cu alloys, followed by Ti-6Al-4V and magnesium alloys such as AZ31, AZ91, and WE43. The synthesis shows that heat input, wire feed speed, travel speed, interpass temperature, shielding gas, and deposition strategy strongly control bead geometry, grain morphology, porosity, residual stress, and anisotropy. Cold metal transfer and pulsed arc variants generally improve process stability for aluminum alloys. At the same time, titanium and magnesium systems require stricter oxidation and thermal-cycle control. Optimized WAAM parts can approach wrought-material properties. However, porosity, hot cracking, surface waviness, distortion, and limited in-situ quality assurance remain barriers to wider certification. Future work should prioritize closed-loop monitoring, WAAM-specific alloy design, hybrid post-processing, fatigue qualification, and life-cycle assessment for large-scale lightweight structures. This review provides a concise evidence map to support parameter selection and research planning for WAAM-based lightweight components.
Co-Authors Agus Widyianto Atik Setyani Muhammad Fahrurozy Pradaya Paryanto Riswan Dwi Djatmiko Thedy Kristanto