Effects of milling time on the microstructures of sintered Fe-16Cr-4Al-0.4Y2O3 ODS ferritic steel

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Published Jul 18, 2018
Citation Analysis

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E.A. Basuki
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
F. Ramaputra
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
N.A. Rabbani
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
S. Ardiansyah
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
A.M. Khan
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
A. Korda
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
F. Muhammad
Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha No 10, Bandung, 40132, Indonesia
D.H. Prajitno
Nuclear Technology Center for Materials and Radiometry, National Atomic Agency of Indonesia, Jl. Taman Sari No 71, Bandung, 40132, Indonesia

Abstract

Oxide dispersion-strengthened (ODS) ferritic steels have high microstructural stability at high temperatures and provide high creep resistance as well as resistance to swelling due to neutron radiation in nuclear reactors. Mechanical alloying is normally used to manufacture the ODS alloys for nuclear reactor components. The parameters of this process influence strongly on the microstructures and properties of the materials. This paper discusses the effect of milling time on the microstructures of Fe-16Cr-4Al-0.4Y2O3 ODS ferritic steel. Planetary ball milling was used to prepare powder composites with milling times of 30, 60, 90 and 120 minutes. Sintering of composite green compacts was carried out at 800, 900, and 1000 °C. X-ray diffraction was used to characterize the phases formed in the ODS alloy. Analysis of microstructure, density and porosity of the sintered ODS ferritic steel was done using scanning electron microscopy and energy dispersive spectroscopy. It was found that milling for 60 minutes gave the lowest pore density in the sintered samples. A fully dissolved solid solution of α-Fe was found when the milling was carried out for at least 60 minutes.

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Issue
Vol. 14 No. 2 (2018)
Section
Articles