Study on Radiation Shielding Characteristics of Refractory High Entropy Alloys by EpiXS Code

Abstract

Refractory high entropy alloys constituted of refractory alloying elements, such as W, Zr, Nb, Ti, Mo, Ta, and Hf, are of great interest due to their widespread use in areas such as the defense, aerospace, and nuclear power generation industries. Refractory high entropy alloys are one of the subgroups of high entropy alloys and are evaluated as great candidates for replacements of superalloys commonly used at high temperatures due to their good mechanical properties and corrosion and oxidation resistance at high temperatures. The motivation for performing this study is that there is currently no comprehensive analysis of the radiation shielding abilities of this new type of high entropy alloys. The purpose of the study was to evaluate the radiation attenuation parameters such as mass and linear attenuation coefficients, half value layer, mean free path, effective atomic number, and buildup factors of the refractory high entropy alloys, Al0.5Mo0.5NbTa0.5TiZr, Al0.25NbTaTiZr, HfMoScTaZr, Nb40Ti25Al15V10Ta5Hf3W2, NbCrMo0.5Ta0.5TiZr, Ti2VNbMoZr, and W23Mo23V17Cr8Ta7Fe22 by using EpiXS software. The mass attenuation coefficients of the alloys were also calculated by XCOM, a well-known code, to see the consistency of the obtained values. It was concluded that HfMoScTaZr and W23Mo23V17Cr8Ta7Fe22 have more shielding features, while Ti2VNbMoZr has the lowest shielding ability among the alloys.

Gamma-ray, fast neutron and ion shielding characteristics of low-density and high-entropy Mg–Al–Ti–V–Cr–Fe–Zr–Nb alloy systems using Phy-X/PSD and SRIM programs

“…The adverse impact on alloy properties caused by the formation of undesired phases or intermetallic compounds is mitigated by the high configuration entropy inherent in HEAs, resulting in the formation of a solid solution comprising either a face-centered cubic (FCC) or a body-centered cubic (BCC) structure, or a combination of these phases [31] , [32] . Some of the many applications of such next-generation materials include fields such as biomedical devices, chemical plants, submarines, aircraft, and golf club heads [33] , [34] , [35] . Many physical, mechanical, structural, and hardness assessments of many HEAs, which are formed mostly from elements like Cr, Fe, Co, and Ni, have been elucidated previously by many researchers.…”