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All Journal Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir Science and Technology Indonesia
Maman Kartaman Ajiriyanto
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Environmental Science Materials Science & Nanotechnology Physics

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PENGARUH TEMPERATUR DAN KOMPOSISI Nb TERHADAP INTERDIFUSI PADUAN U-Zr-Nb Maman Kartaman Ajiriyanto; Masrukan Masrukan; Fajar Al Afghani; Yanlinastuti Yanlinastuti
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 27, No 3 (2021): Oktober, 2021
Publisher : website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2021.27.3.6503

Abstract

PENGARUH TEMPERATUR DAN KOMPOSISI Nb TERHADAP INTERDIFUSI PADUAN U-Zr-Nb. Telah dilakukan simulasi percobaan intermik bahan bakar U-Zr-Nb dengan pelat aluminium. Mula-mula dibuat ingot paduan U-6Zr-2Nb, U-6Zr-5Nb, dan U-6Zr-8Nb menggunakan tungku peleburan busur listrik. Ingot yang diperoleh dipotong-potong menjadi berukuran ketebalan 2-3 mm dan diameter sekitar 5-6 mm selanjutnya ditutup menggunakan pelat Al pada salah satu sisinya serta dipress. Setelah dipress, ingot paduan U-6Zr-2Nb, U-6Zr-5Nb, dan U-6Zr-8Nb   dipanaskan pada temperature 350 dan 450 °C selama 1 jam. Setelah dipanaskan ingot dikenai beberapa pengujian yaitu mikrostruktur menggunakan mikroskop optik dan Scanning Electron Microscope (SEM) yang dilengkapi dengan Energy Dispersive Spectrometer (EDS), kekerasan menggunakan uji kekerasan mikro, dan fasa dengan alat X-ray diffractometer (XRD). Hasil pemeriksaan mikrostruktur menunjukkan masih terlihat dengan jelas batas antara lapisan (interface) U-6Zr-2Nb, U-6Zr-5Nb, dan U-6Zr-8Nb dengan lapisan Al. Semakin tinggi kandungan Nb semakin rapat  rapat interface antara kedua lapisan.  Pada pengujian kekerasan mikro terlihat bahwa kekerasan pada interface sulit diukur sedangkan pada daerah U-Zr-Nb menunjukkan kenaikan kekerasan pada pemanasan dari 350 menjadi 450 °C, sedangkan pada bagian Al terjadi penurunan kekerasan pada kenaikan temperatur pemanasan dari 350 menjadi 450 °C.  Terbentuk senyawa UO3 pada semua sampel uji sedangkan fasa γ-U terbentuk pada sampel U-6Zr-2Nb baik yang dipanaskan pada temperatur 350 maupun 450 °C.Kata kunci:  Intermik, paduan U-Zr-Nb, aluminium, mikrostruktur, kekerasan, fasa.
Nichrome Dependency in Welding Layer Using In situ Fabrication on Hardness and Corrosion Properties Syaripuddin; Sopiyan; Muhammad Fauzan Perdana Putra; Maman Kartaman Ajiriyanto; Sigit Dwi Yudanto; Muhammad Yunan Hasbi; Susetyo, Ferry Budhi
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.3.651-659

Abstract

The use of shielded metal arc welding (SMAW) equipment to synthesize alloys is one of the most promising methods as it can be used for in-situ fabrication. The hardness and corrosion properties of the deposited layer during the welding process can be enhanced by dilution of nichrome (NiCr) during the process. Therefore, the alloy was synthesized on the surface of the mild steel using SMAW equipment with various NiCr additions. The properties of the alloy were investigated using an X-ray diffraction (XRD), an Optical microscope, a Potentiostat, and a Vickers hardness apparatus. The appearance of martensite overlaps with the ferrite phase could be affected by the addition of NiCr to the alloy. An increase in NiCr content is followed by an increase in the lattice parameter value of the ferrite phase. The presence of a certain amount of nickel (Ni) contributes to the formation of lower transformation phases, including martensite. At the same time, the incorporation of chromium (Cr) also plays a significant role in promoting the formation of acicular ferrite. An increase in NiCr content in NiCr2 and NiCr3 samples results in a quantitative increase in martensite formation. Adding 0.434 g of NiCr to the weld deposited layer could result in the corrosion rate of the alloy being 0.1118 mm/y. Higher hardness is found in the NiCr3 sample, around 742.06 HV.
Co-Authors Fajar Al Afghani Ferry Budhi Susetyo Masrukan Masrukan Muhammad Fauzan Perdana Putra Muhammad Yunan Hasbi Sigit Dwi Yudanto Sopiyan Syaripuddin Yanlinastuti Yanlinastuti