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All Journal EPI International Journal of Engineering JIETech
Sutresman, Onny S
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Increased Hardness Value due to the Diffusion of Low-Temperature Carburizing Process ., Nitha; Sutresman, Onny S; Aminy, Ahmad Yusran; Arma, Lukmanul Hakim
EPI International Journal of Engineering Vol 6 No 1 (2023): Volume 6 Number 1, February 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022023.03

Abstract

This research to determine the effect of the tensile load on the carburizing process and the heating temperature lower than the normal carburizing temperature on the hardness of carbon steel with a percentage of 80% buffalo bone charcoal and 20% BaCO3, 20 mesh grain size, 4 hours holding time, and slow cooling with a tensile load of 1/4σp 1/2σp 3/4σp, and σp (proportional stress). The heating temperatures below normal carburizing temperatures, namely 6000C, 6500C, 7000C, and 7500C while being pulled by 1/4σp, 1/2σp, 3/4σp, and σp. After reaching the heating temperature, the material is held in the furnace for 4 hours and cooled slowly. After the material is cold, mechanical testing is carried out with Vickers microhardness. Hardness value at a temperature of 6000C is 103.93 HRB, at a temperature of 6500C is 104.33 HRB, at a temperature of 7000C is 104.80 HRB, and at a temperature of 7500C is 106.60 HRB, while the process of pack carburizing without tensile at a heating temperature of 8000C is 105.2 HRB. This proves that the application of loads at lower heating temperatures during the heating process can exceed the hardness value without tensile loads at higher temperatures of 8000 C.
Karakterisasi Mikrostruktur Paduan Mg-Zn-Ca dengan Metode Metalurgi Serbuk untuk Aplikasi Biomedis Simons, Yuliana; Sutresman, Onny S; Arsyad, Hairul
Journal of Industrial Engineering and Technology Vol 1 No 2: Juli 2025
Publisher : Department of Industrial Engineering, Faculty of Industrial Technology, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/jietech.v1i2.56

Abstract

Penelitian ini bertujuan untuk menganalisis karakteristik mikrostruktur Paduan Mg-Zn-Ca yang disintesis melalui metode metalurgi serbuk dengan variasi komposisi (89Mg-10Zn-1Ca, 93Mg-6Zn-1Ca dan 97Mg-2Zn-1Ca) serta sintering pada suhu 600℃. Hasil analisis menunjukkan bahwa Paduan 89Mg-10Zn-1Ca menghasilkan mikrostruktur yang paling homogen dengan distribusi fasa sekunder yang merata, porositas terkendali dan sedikit cacat, sehingga berpotensi oprimal untuk aplikasi implant tulang. Sebaliknya, Paduan 93Mg-6Zn-1Ca dan 97Mg-2Zn-1Ca menunjukkan ketidakhomogenan fasa, porositas tinggi. Komposisi Zn ≥ 10% dalam sistem Mg-Zn-Ca mampu meningkatkan desifikasi dan kualitas mikrostruktur setelah sintering, sehingga Paduan 89Mg-10Zn-1Ca merupakan kandidat menjanjikan untuk pengembangan implant tulang biodegradable.
Co-Authors Ahmad Yusran Aminy Hairul Arsyad Lukmanul Hakim Arma Nitha Nitha Simons, Yuliana