cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Agung Premono
Contact Email
jurnalkem@gmail.com
Phone
+6221-4700918
Journal Mail Official
jkem@unj.ac.id
Editorial Address
Rumpun Teknik Mesin, Fakultas Teknik, Universitas Negeri Jakarta
Location
Kota adm. jakarta timur,
Dki jakarta
INDONESIA
Jurnal Konversi Energi dan Manufaktur
Published by Universitas Negeri Jakarta
ISSN : 23392029     EISSN : 26225565     DOI : https://doi.org/10.21009/JKEM
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
This journal aims as a medium for lecturers, researchers and practitioners to discuss result of their research in the field of mechanical engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 183 Documents
 15   16   17   18   19 
Comparative Characterization of Indonesian AISI 316L Stainless Steel and Commercial Femoral Stem for Artificial Hip Joint Applications Wahyudi, Mujib; Ismail, Rifky
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.1.7

Abstract

The development of the femoral stem, part of the artificial hip joint, requires a material with microstructures, mechanical properties, and chemical composition that meet the requirements of a medical implant. This study aims to characterize and compare Indonesian AISI 316L stainless steel with two commercial femoral stem implants used by patients, namely XYZ products from the United States and ABC products from India. The tests carried out on the three products include tensile tests, macro hardness, microhardness, microstructure observations, and chemical composition analysis. The tensile test results show that XYZ products have the highest ultimate tensile strength (UTS) of 1065.6 ± 11.7 MPa, while the Indonesian AISI 316L (IDN) and ABC products showed lower UTS values of 580.9 ± 0.3 and 536.3 ± 9.4 MPa, respectively. Microhardness tests showed that XYZ products achieved the highest hardness value of 306.0 ± 13.5 VHN with an increasing hardness gradient towards the surface. Meanwhile, the Indonesian AISI 316L materials showed a relatively homogeneous hardness distribution with an average value of approximately 197.5 ± 1.3 VHN. Observation of microstructures reveals differences in grain size and distribution, which correlate with microhardness values. Analysis of the elemental composition shows that all three materials exhibit characteristics of austenitic stainless steel with variations in the alloy element content. Overall, the results highlight the influence of microstructural features and alloy composition on mechanical performance. Although the Indonesian AISI 316L material evaluated in this study is not classified as implant-grade stainless steel, the findings provide a baseline reference for future material development. It emphasizes the need for strict compliance with implant-grade standards, manufacturing optimization, and surface treatment to enable potential application in femoral stem component.
Design of Coconut Milk Pressing Machine with Two Screw Shafts to Improve Extraction Efficiency and Quality Setiawan, Angga; Wijaya, Rahmat; Subeno, Agus; Budi Affandi, Arif; Okviyanto, Toni; Mubina Dewadi, Fathan
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.1.8

Abstract

Coconut milk pressing machines play an important role in coconut processing; however, conventional single-screw designs still face limitations related to pressure distribution and extraction stability. This study aims to design and analyze a coconut milk pressing machine, employing a counter-rotating two screw shafts configuration as an alternative to commonly used single-screw systems. The research methodology includes a reverse-engineering approach, analytical calculations to determine pressing capacity, power, torque, and pressure, and finite element analysis (FEA) simulations to evaluate the structural strength of main components. The analytical results indicate that the proposed design achieves a theoretical pressing capacity of 53 kg/h, with a shaft power requirement of 1.11 kW and a pressing pressure of 1.67 × 10⁵ N/m². FEA results show that the Von Mises stress and deformation remain below the allowable limits of the selected material, indicating a conservative, structurally safe design. All results presented in this study are theoretical and numerical in nature and have not yet been validated through experimental testing. The novelty of this work lies in the application of a counter-rotating two screw shafts configuration, which theoretically provides a more uniform pressure distribution than conventional single-screw systems without a significant increase in power consumption. Future work will focus on prototype fabrication and experimental testing to validate extraction performance, energy efficiency, and hygienic aspects.
Effectiveness of Epoxy Coating on Metal Surfaces of NEW773CAT Heavy Equipment Units Subeno, Agus; Setiawan, Angga; Okviyanto, Toni; Sumarna, Herlin; Setiawan, Dibyo; Widyawati, Fauzi
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.1.6

Abstract

This study investigates the effectiveness of the epoxy coating system on NEW773CAT heavy equipment unit operating in a mining environment. The research primarily focuses on the influence of surface preparation methods, dry film thickness (DFT), and coating type on corrosion resistance and adhesion strength. Field case studies, thickness measurements, and visual inspections were employed to assess the performance of coating system. The results reveal that average coating thickness of 396 μm significantly exceeds the minimum ISO 12944 category C5-I standard, which specifies a DFT of 320-400 μm for high corrosivity environments. The surface preparation process using high-pressure cleaning and power tool cleaning (ST 3.0) was found to produce an ideal substrate for epoxy coating application. The use of high-built epoxy mastic as the primer and Aliphatic Polyurethane as the top coat demonstrated excellent corrosion protection and optimal interlayer adhesion. The spray application technique resulted in a uniform coating with no visible defects. This study emphasizes the importance of combining effective surface preparation and precise coating specifications to ensure long-term protection of metal surfaces in harsh environments. The findings suggest that epoxy coating systems, when correctly applied and prepared, can provide robust protection against corrosion, extending the service life of heavy equipment exposed to aggressive conditions like those found in mining operations.

Page 19 of 19 | Total Record : 183

 15   16   17   18   19 

Filter by Year

2013 2026


Reset
Filter By Issues
All Issue Vol. 11 No. 1 (2026) Vol. 10 No. 2 (2025) Vol. 10 No. 1 (2025) Vol. 9 No. 2 (2024) Vol. 9 No. 1 (2024) Vol. 8 No. 2 (2023) Vol. 8 No. 1 (2023) Vol. 7 No. 2 (2022) Vol. 7 No. 1 (2022) Vol. 6 No. 1 (2019) Vol. 5 No. 2 (2018) Vol. 5 No. 1 (2018) Vol. 4 No. 2 (2017) Vol. 4 No. 1 (2017) Vol. 3 No. 3 (2016) Vol. 3 No. 2 (2016) Vol. 3 No. 1 (2016) Vol. 2 No. 2 (2015) Vol. 2 No. 1 (2015) Vol. 1 No. 3 (2014) Vol. 1 No. 2 (2014) Vol. 1 No. 1 (2013) More Issue