Article Per Year (5 Year)
p-Index From 2021 - 2026
0.61
P-Index
This Author published in this journals
All Journal JMPM (Jurnal Material dan Proses Manufaktur) JURNAL CRANKSHAFT Jurnal Konversi Energi dan Manufaktur
Nursyifaulkhair, Desrilia
Unknown Affiliation
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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

Found 3 Documents
Search

 1 
OPTIMASI PERLAKUAN PANAS AUSTEMPERING UNTUK MENINGKATKAN PERFORMA BAJA AISI 4340 Nursyifaulkhair, Desrilia; Herningtyas, Amelia Syifa; Rachmawati, Audiya Dewi; Zulfika, Dicki Nizar
JURNAL CRANKSHAFT Vol. 8 No. 4 (2025): Jurnal Crankshaft Vol. 8 No. 4 (2025)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v8i4.15879

Abstract

Baja AISI 4340 merupakan baja paduan rendah yang banyak digunakan dalam industri manufaktur, terutama untuk komponen kritis, seperti poros, roda gigi, dan piston. Komponen-komponen tersebut membutuhkan kombinasi antara kekerasan tinggi dan ketangguhan yang baik, yang dapat diperoleh melalui perlakuan panas yang tepat. Salah satu metode perlakuan panas yang efektif untuk meningkatkan sifat mekanis adalah melalui proses austempering. Penelitian ini bertujuan untuk mengevaluasi respons mikrostruktur dan kekerasan baja AISI 4340 terhadap tiga variasi metode perlakuan panas austempering, yaitu isothermal austempering, up-quenching austempering, dan modified austempering. Metode pertama, isothermal austempering, dilakukan dengan memanaskan baja hingga temperatur austenisasi pada 800 °C, kemudian dilakukan proses pemanasan secara isotermal pada temperatur 430 °C. Metode kedua, up-quenching austempering, dilakukan dengan proses austenisasi yang diikuti oleh pendinginan dalam furnace dan dilanjutkan dengan austempering pada temperatur 500 °C. Sedangkan metode ketiga, modified austempering, dilakukan dengan austenisasi yang diikuti oleh pencelupan dengan media pendingin oli pada temperatur 250 °C sebelum dilakukan austempering pada temperatur 400 °C. Hasil pengamatan metalografi melalui mikroskop optik menunjukkan bahwa ketiga metode perlakuan panas tersebut menghasilkan struktur mikro yang berbeda-beda, yaitu upper bainite, lower bainite, dan martensite, namun semuanya mengandung austenit sisa dalam jumlah tertentu. Sementara itu, pengujian sifat mekanis berupa kekerasan menggunakan Rockwell C menunjukkan bahwa metode isothermal austempering menghasilkan kekerasan tertinggi, yaitu sebesar 44,4 HRC. Nilai kekerasan berikutnya diikuti oleh modified austempering sebesar 42,9 HRC, dan up-quenching austempering sebesar 28,1 HRC. Berdasarkan hasil tersebut, isothermal austempering menjadi metode paling efektif dan layak untuk diterapkan dalam skala industri karena mampu menghasilkan kekerasan yang optimal.
Study of the Mechanical Properties of Ship Cleats Fabricated from Recycled High-Density Polyethylene Nisazarifa, Adristi; Rosalina, Amanda; Nursyifaulkhair, Desrilia; Wibawa, I Putu Arta; Saputra, Muhammad Rizki Andika
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.
Effect of SMAW Process Parameters on Hardness, Temperature Distribution, and Micro–Macro Structure of A36 Steel Welded Joints Nursyifaulkhair, Desrilia; Priyambodo Nur Ardi Nugroho; Wardani, Dianita; Kharismajid , Kharismajid; Al Amin , Mochammad Karim; Khazi , Muhamad Eko Nur
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.11.1.1

Abstract

The outer shell of an ISO tank plays a critical role in maintaining the integrity of its contents by withstanding temperature fluctuations, pressure, and radiation. Research on the fabrication of liquefied natural gas (LNG) tank outer shells therefore provides both scientific and practical value, particularly in ensuring mechanical reliability and structural performance. This study investigates the welding of American Society for Testing Materials (ASTM) A36 steel plates using shielded metal arc welding (SMAW) and evaluates the effect of welding parameters on mechanical and microstructural properties. Four specimens were prepared by varying welding current at 70 and 80 A on plate thicknesses of 4 and 12 mm. The results indicate that both current and thickness significantly influence the weld zone microstructure, with transformations from ferrite–pearlite in the base metal to widmanstätten and acicular ferrite in the weld metal. In terms of mechanical performance, the highest hardness value of 198.387 HVN was recorded in the 4 mm specimen welded at 70 A, demonstrating the strong dependence of hardness on combined current and thickness conditions. These findings contribute to optimizing welding parameters for the safe and reliable application of LNG tank outer shells.
Co-Authors Dianita Wardani Herningtyas, Amelia Syifa Kharismajid , Kharismajid Khazi , Muhamad Eko Nur Mochammad Karim Al Amin Nisazarifa, Adristi Priyambodo Nur Ardi Nugroho Rachmawati, Audiya Dewi Rosalina, Amanda Saputra, Muhammad Rizki Andika Wibawa, I Putu Arta Zulfika, Dicki Nizar