Akademik Veri Yönetim Sistemi
El-Cezeri Journal of Science and Engineering, cilt.8, sa.2, ss.552-566, 2021 (Scopus)
© 2021, TUBITAK. All rights reserved.With the developing technology, the use of ionizing radiation in many areas such as health, nuclear power plants, medical oncology, industry and technology, contact lenses, and with this, the possibility of exposure to radiation for living creatures increases. One of the basic facts of protection from the harmful effects of radiation is shielding. In this study, gamma and X-ray radiation shielding capabilities of the selected 14 Ni-based superalloys (Nimonic 901, Alloy 10, Hastelloy X, Haynes 242, Incoloy 801, Inconel 706, Nasair 100, PWA 1480, X4, Nominal, H282-B, H282-C, 247, MCrAlYHf) were examined and compared with each other. WinXCOM program is used for this. For this, the mass attenuation coefficient (μρ ), half-value thickness layer (HVL), effective atomic number (Zeff), and electron density (Nel) which are important parameters in shielding γ and X rays, were calculated for the alloys studied in the energy range between 1 keV and 100 GeV In addition, photon build-up factor is an important parameter in shielding and radiation dose calculations. For this reason, the exposure buildup factors (EBF) of Ni-based superalloys were obtained in the energy range of 0.015–15 MeV for different penetration depths (1-40 mfp). For X4 and PWA 1480 superalloys, μρ values are found as 74.71 cm2/g-0.033 cm2/g and 74.50 cm2/g-0.033 cm2/g, respectively for 0.015 and 15 MeV photon energies, while Zeff values vary between 35.135-32.322 and 35.013-32.221. The μρ values and Zeff values for MCrAlYHf alloy range from 56.79 cm2/g-0.031 cm2/g and 25.867-26.686, respectively. As a result, among the selected samples, nickel-based X4 and PWA 1480 superalloys have the largest μρ and Zeff, values, while the smallest HVL and EBF values. In this case, considering all energy regions, all of the calculated parameters depend on the elemental composition of the samples. Accordingly, it can be said that X4, PWA1480 superalloys have the highest radiation absorption capability among Ni-based superalloys and has superior radiation absorption capability than many armor materials currently used.