A New Synthesized Microalloys Steel ODS of High Amplitude Ultrasonically Irradiation

Authors

Marzuki Silalahi, PSTBM-BATAN, Puspiptek Serpong Area, Tangerang Selatan 15314, IndonesiaFollow
Hanif Abdurrahman Wicaksana, Department of Metallurgy, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia
Ferhat Aziz, PSTBM-BATAN, Puspiptek Serpong Area, Tangerang Selatan 15314, Indonesia
Syahfandi Ahda, PSTBM-BATAN, Puspiptek Serpong Area, Tangerang Selatan 15314, Indonesia
Mohamad Riza Iskandar, Central Facility for Electron Microscopy, RWTH Aachen University, Aachen 52074, Germany

Abstract

Micropowders of oxide-dispersion-strengthened (ODS) steel have been synthesized using the ultrasonic irradiation method with variations in amplitude. The ultrasonic irradiation process is performed for 50 h at a frequency of 20 kHz with 40%, 50%, and 60% amplitudes in toluene solution. The formation of Fe-Cr microalloys in the preparation of Fe- 15Cr-0.5Y2O3 powder was analyzed using SEM-EDS, X-ray diffraction (XRD), and TEM-EDS. The percentage of Fe- Cr phase mass fraction of ODS steel micropowder formed during ultrasonic irradiation with 40%:50%:60% amplitude was 12.2%:34.1%:22.1%, with 25.67:77.02:38.51 nm crystallite size. The crystallite size at 50% amplitude was the largest, and the diffusion process of Fe-Cr-Y2O3 microparticles was most dominant at 50% amplitude. The Fe and Cr phases are still present when the ODS particles successfully dispersed in the main particle.

Bahasa Abstract

Sintesis Baru Paduan Mikro Baja ODS dengan Irradiasi Ultrasonik Amplitudo Tinggi. Serbuk mikro dari baja yang diperkuat dengan dispersi oksida (ODS) telah disintesis menggunakan metode iradiasi ultrasonik dengan variasi amplitudo. Proses iradiasi ultrasonik dilakukan selama 50 jam pada frekuensi 20 kHz dengan amplitudo 40%, 50%, dan 60% dalam larutan toluena. Pembentukan paduan mikro Fe-Cr dalam preparasi serbuk Fe-15Cr-0.5Y2O3 dianalisis menggunakan SEM-EDS (scanning electron microscopy–energy-dispersive spectroscopy), difraksi sinar-X (XRD), dan TEM-EDS (transmission electron microscopy–energy-dispersive spectroscopy). Persentase fraksi massa fasa Fe-Cr dari serbuk mikro baja ODS yang terbentuk selama iradiasi ultrasonik dengan amplitudo 40%: 50%: 60% adalah 12,2%:34,1%: 22,1%, dengan ukuran kristalit 25,67: 77,02: 38,51 nm. Ukuran kristalit pada amplitudo 50% adalah yang terbesar, dan proses difusi partikel mikro Fe-Cr-Y2O3 paling dominan pada amplitudo 50%. Fasa Fe dan Cr masih ada ketika partikel ODS berhasil terdispersi dalam partikel utama.

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Recommended Citation

Silalahi, Marzuki; Wicaksana, Hanif Abdurrahman; Aziz, Ferhat; Ahda, Syahfandi; and Iskandar, Mohamad Riza (2019) "A New Synthesized Microalloys Steel ODS of High Amplitude Ultrasonically Irradiation," Makara Journal of Technology: Vol. 23: Iss. 3, Article 2.
DOI: 10.7454/mst.v23i3.3880
Available at: https://scholarhub.ui.ac.id/mjt/vol23/iss3/2