cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Tri Wahyono
Contact Email
wahyonotri25@gmail.com
Phone
-
Journal Mail Official
hsosiati@gmail.com
Editorial Address
-
Location
Kab. bantul,
Daerah istimewa yogyakarta
INDONESIA
JMPM (Jurnal Material dan Proses Manufaktur)
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 25803271     EISSN : 26565897     DOI : 10.18196/jmpm
Core Subject : Engineering,
Engineering Mechanical Engineering
Jurnal Material DAN Proses Manufaktur focuses on the research and research review in the field of engineering material and manufacturing processes. The journal covers various themes namely Design Engineering, Process Optimization, Process Problem Solving, Manufacturing Methods, Process Automation, Material research and investigation, Advanced Materials, Nanomaterials, Mechanical solid and fluid, Energy Harvesting and Renewable Energy.
Arjuna Subject : -
Articles 275 Documents
 24   25   26   27   28 
Failure Mechanism Identification of Hook Components in Automatic Machines Using Visual and Material Analysis
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29365

Abstract

The hook component in automatic packaging machines frequently experiences premature failure, leading to increased downtime, higher maintenance costs, and reduced production efficiency. This study aims to identify the failure mechanism of the hook through visual inspection, maintenance data analysis, and material characterization. Visual examination was performed on the fractured hook specimens to identify fracture morphology and surface characteristics. Historical maintenance records from 2017 to 2024 were analyzed to identify the frequency and type of failure. Chemical composition testing was performed using Optical Emission Spectroscopy (OES), while Rockwell hardness testing (HRC) evaluated the material’s mechanical properties. The results indicate that the hook failed through a brittle fracture mechanism, characterized by flat, granular fracture surfaces and the absence of plastic deformation. The primary failure factor was the direct impact between the hook and the punch, which occurred due to mechanical misalignment caused by bearing wear. The material, classified as medium carbon steel with 0.599 wt.% C and 1.000 wt.% Mn, exhibited high hardness but low toughness, leading to a brittle fracture under impact loading. Surface hardening followed by light tempering and shot peening is recommended to improve wear resistance and toughness, thereby reducing the risk of brittle fracture.
Corrosion Rate Analysis of SS400 Steel Plates with Coating Variations in Artificial Seawater
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29410

Abstract

Low-carbon steel such as SS400 is highly susceptible to corrosion, particularly when exposed to marine environments or artificial seawater. One of the most common methods to mitigate corrosion is by applying protective coatings. This study aims to analyze the effect of coating type and thickness on the corrosion rate of SS400 steel using Electrochemical Impedance Spectroscopy (EIS). The samples were prepared by applying two types of coatings, epoxy and flintkote, with variations of one or two layers. The EIS results revealed that uncoated SS400 exhibited the lowest impedance values, while coated samples showed a significant increase in impedance. For epoxy coating, the real impedance (Z’) was 8×104 Ω with a single layer and increased to 4×105 Ω with two layers. In comparison, flintkote coatings demonstrated much higher impedance values, reaching 1.5×107 Ω, particularly with two layers. The substantial increase in impedance indicates that flintkote provides superior barrier properties compared to epoxy, and that applying multiple layers further enhances corrosion resistance. Therefore, two-layer flintkote coating was found to be the most effective in improving the corrosion resistance of SS400 steel in artificial seawater.
A Comparative Study of a Single-Cylinder 211cc Diesel Engine Performance Using B100 Biodiesel, Dexlite, and Pertamina Dex Fuels
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29548

Abstract

This study investigates the performance characteristics of a single-cylinder diesel engine fueled with Pertamina Dex, Dexlite, and B100 biodiesel. Experiments were conducted at 1000, 2000, 3000, and 4500 rpm to evaluate fuel mass flow rate, torque, brake power, BSFC, thermal efficiency, and engine temperature. The test range extends up to 4500 rpm, exceeding the engine’s 3600 rpm rated speed to specifically assess off-design performance and operational limits. The results show that each fuel exhibits a distinct performance profile. Dexlite delivers the highest torque and brake power at medium speeds. It also achieves the lowest BSFC and the highest thermal efficiency at 2000–3000 rpm. Pertamina Dex shows the most stable performance across all engine speeds, with relatively low fuel consumption and the lowest temperature rise, reflecting its refined hydrocarbon composition and high cetane number. B100 biodiesel displays higher mass flow rates and temperatures but demonstrates competitive thermal efficiency, particularly at low and high speeds, due to its oxygen-rich molecular structure that promotes complete combustion. These findings highlight that Dexlite is best suited for mid-speed efficiency-focused applications, Pertamina Dex delivers uniform and stable performance, and B100 offers combustion advantages under specific thermal and load conditions. This study offers guidance for selecting fuels that improve engine performance and support energy-efficient vehicle applications.
Study of the Mechanical Properties of Ship Cleats Fabricated from Recycled High-Density Polyethylene
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29556

Abstract

High-Density Polyethylene (HDPE), known for its high resistance to chemicals and impact, as well as its low carbon emission production process. However, the high production of HDPE plastic waste poses a significant challenge in the maritime world. This study focuses on efforts to recycle HDPE waste generated from the shipbuilding process at the Non-Metal Workshop of the Surabaya State Shipping Polytechnic (PPNS). This HDPE waste has great potential to be processed into ship components, including cleats. Cleats are essential devices on ships that function to tie ropes. HDPE waste is molded into new sheets using the Hot Press Compression Molding method, followed by tensile and bending tests. These values will be compared with the mechanical properties of virgin HDPE and simulated using ANSYS software to evaluate the cleat's resistance to tensile loads of 470 N, 600 N, and 730 N. Simulations show that the cleat can withstand loads of 470 N and 600 N, but fails plastically under a load of 730 N, with the stress exceeding its yield strength. The results of this study are expected to contribute to the development of more sustainable shipbuilding technology and encourage the development of other recycled products in the maritime industry.
Experimental Study of Photovoltaic System Conversion into Thermal Energy Using 50 Wp Solar Module
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29684

Abstract

The battery is the most vital component in a photovoltaic system. Under high solar irradiation, the battery may experience overcharging, primarily if the voltage limiter in the battery charge controller is not functioning correctly. To prevent excessive voltage buildup, the electrical energy is redirected for use in a water heating system. This study aims to experimentally examine the conversion of electrical energy from solar modules into thermal energy for heating water. The experiment was conducted outdoors using a photovoltaic setup comprising a 50 Wp solar module, a 10 A battery charge controller, and a 70 Ah battery. The water heating system includes a 25-liter water tank, a DC pump, an electric heater, a flowmeter, and piping components. Data were collected on solar module current and voltage, solar irradiation, and water temperature. The analysis shows that electrical power, thermal energy, and water temperature increase with higher solar irradiation. Throughout the experiment, the battery remained protected from overcharging. This energy conversion system successfully produced hot water at a maximum temperature of 37.68°C under an average solar irradiation of 586.31 W/m².

Page 28 of 28 | Total Record : 275

 24   25   26   27   28 

Filter by Year

2017 2025


Reset
Filter By Issues
All Issue Vol. 9 No. 2 (2025): December Vol. 9 No. 1 (2025): June Vol 8, No 2 (2024): DESEMBER Vol. 8 No. 2 (2024): Desember Vol. 8 No. 2 (2024): December Vol. 8 No. 1 (2024): Juni Vol. 8 No. 1 (2024): June Vol 8, No 1 (2024): Juni Vol. 7 No. 2 (2023): Desember Vol 7, No 2 (2023): Desember Vol. 7 No. 2 (2023): December Vol 7, No 1 (2023): Juni Vol. 7 No. 1 (2023): Juni Vol. 7 No. 1 (2023): June Vol 6, No 2 (2022): Desember Vol 6, No 1 (2022): Juni Vol. 6 No. 1 (2022): Juni Vol 5, No 2 (2021): December Vol 5, No 1 (2021): Juni Vol 4, No 2 (2020): DESEMBER 2020 Vol 4, No 1 (2020): JUNI 2020 Vol 4, No 2 (2020): Desember Vol 4, No 1 (2020): Juni Vol 3, No 2 (2019): DESEMBER 2019 Vol 3, No 1 (2019): JUNI 2019 Vol 3, No 2 (2019): Desember Vol 3, No 1 (2019): Juni Vol 2, No 2 (2018): DESEMBER 2018 Vol 2, No 2 (2018): DESEMBER 2018 Vol 2, No 1 (2018): JUNI 2018 Vol 2, No 1 (2018): JUNI 2018 Vol 2, No 2 (2018): Desember Vol 2, No 1 (2018): Juni Vol 1, No 2 (2017): DESEMBER 2017 Vol 1, No 2 (2017): DESEMBER 2017 Vol 1, No 1 (2017): JUNI 2017 Vol 1, No 1 (2017): JUNI 2017 Vol 1, No 2 (2017): Desember Vol 1, No 1 (2017): Juni More Issue