Article Per Year (5 Year)
p-Index From 2021 - 2026
1.704
P-Index
This Author published in this journals
All Journal Academia Praja : Jurnal Ilmu Politik, Pemerintahan dan Administrasi Publik Indonesian Journal of Engineering and Science (IJES) Neo Politea : Jurnal Ilmiah Administrasi Negara Jurnal Dialog Jurnal SOSPOL Malcom: Indonesian Journal of Machine Learning and Computer Science Global Mind Jurnal Imliah Hubungan Internasional Metalurgi Jurnal Pengabdian Tri Bhakti
Ahmad Zakiyuddin
Universitas Langlangbuana
Humanities Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 11 Documents
Search

 1   2 
Corrosion Behavior of Equiatomic Bio-High Entropy Alloys CoCrMoMnNb Fabricated in Multiple Remelting Processes Rokhmanto, Fendy; Erryani, Aprilia; Setyawan, Albertus Deny Heri; Thaha, Yudi Nugraha; Zakiyuddin, Ahmad; Kartika, Ika; Harjanto, Sri
Metalurgi Vol 39, No 3 (2024): Metalurgi Vol. 39 No. 3 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.782

Abstract

High-entropy alloys are described as equiatomic alloys of more than five elements or materials with five or more element constituents with a high mixing entropy (ΔSmix ≥ 1.5R), where the composition of the element is 5–35%, respectively. One application of HEA (high entropy alloys) materials is in the orthopedic field, where they are developed as biomaterials. Behavior, the correlation between the elemental distribution, and the microstructure of the material were investigated during multiple remelting processes known as Bio-HEAs. The development of Bio-HEAs is exciting in terms of design material, fabrication, and their properties. In this paper, the corrosion behavior and the correlation of the elemental distribution and the microstructure of the material were investigated during the multiple remelting process. The equiatomic CoCrMoMnNb was prepared in vacuum arc melting under an argon atmosphere and melted in a water-cooled copper mold. The total amount of ingot was approximately 25 grams, then flipped and remelted several times, 4, 8, and 12 cycles. The final composition of the alloys was confirmed by EDX (energy dispersive x-ray spectroscopy). The microstructure was investigated with an optical microscope and the SEM (scanning electron microscope). The corrosion parameter occurred in Hank’s solution at 37°C, at a scan rate of 1 mV/s. The CCM-MnNb fabricated with 8 cycles of the remelting process exhibits the lowest corrosion rate (0.0038 mmpy) and donor densities (2.67 × 10¹⁹ cm⁻³), while the charge transfer resistance number is the highest (18250.94 Ω cm⁻²). The outstanding corrosion resistance of the alloys is induced by the presence of the finer dendrites and the chromium oxide (Cr₂O₃) protective layer on the alloy's surface.
Co-Authors Aulia, Shelina Rahma Erryani, Aprilia Ika Kartika Indri Utami Moch Yunus Kholis Rahardian, Krisnandha Regi Rahmawati Rini Riastuti, Rini Rokhmanto, Fendy Setyawan, Albertus Deny Heri Slamet Parsono Sri Harjanto Suhermanudin Suhermanudin Thaha, Yudi Nugraha Tripangestu, Muhamad Aldi Utami, Indri