Gamma-ray and neutron shielding properties of the AA6082 + TiO2 (0-50wt.%) functionally graded composite materials (FGCMs) were investigated using the PSD software. The values of the mean free path (MFP), half-value layer (HVL), linear attenuation coefficients (LAC), mass attenuation coefficient (MAC), tenth-value layer (TVL), exposure buildup factors (EBF), effective atomic number (Zeff), effective conductivity (Ceff), and fast neutron removal cross-sections (FNRC) were found for the energy range between 0.015–15 MeV. The increase in the TiO2 content in the AA6082 composite material has raised the values of MAC and LAC. The calculations for the EBFs were carried out using the G-P fitting method for the energy range between 0.015–15 MeV and penetration depth of up to 40 mfp. The results revealed that HVL values ranged between 0.01-0.116 cm, TVL values ranged between 0.01-0.385 cm, FNRC values ranged between 7.918-10.017 cm-1, and Ceff values ranged between 5.67 x1010 and 9.85x1010 S/m. The AA6082 + TiO2 (50%) composite material was observed to provide the maximum photon and neutron shielding capacity since it offered the highest Zeff, MAC, and FNRC values, and the lowest HVL value. In terms of several aspects, the research is considered original. Besides contributing to several technologies including nanotechnology and space technologies, present research’s results may contribute to nuclear technology.

In this study, Phy-X/PSD software was utilized for searching the neutron shielding and gamma-ray shielding features of the high-speed steel composites. The effects of the Al2O3 and SiO2 contents on the irradiation properties of the T15 (0.4Si, 0.4Mn, 0.5Mo, 1.5C, 4.5Cr, 4.75Co, 5.0V, 12.5W)+(0-30%) composite material were examined. The properties of the linear attenuation coefficients (LAC), half-value layer (HVL), fast neutron removal cross-sections (FNRC), mean free path (MFP), effective conductivity (Ceff ), mass attenuation coefficient (MAC), exposure buildup factors (EBF), tenth-value layer (TVL), effective atomic number (Zeff ) were determined for the energy varying between 0.015 MeV and 15 MeV. The investigation revealed that the MAC and LAC values in the T15 composite material declined with the increase in the SiO2 or Al2O3 contents in the composite. On the other hand, the Geometric Progression (G-P) method was utilized to determine the EBFs under the penetration depth of up to 40 mfp and the same energy range. According to the results of the G-P method, the values of HVL varied from 0.01 to0.034 cm, TVL values varied from 0.01 to 0.112 cm, while FNRC values varied from 6.584cm-1 to 8.27 cm-1, and Ceff values varied from 1.36 x1011S/m to 3.12x1011 S/m. The results revealed that the T15 high-speed steel composite provided the maximum photon shielding capacity because it showed the lowest HVL value while showing the highest Zeff , and MAC values. The T15 + 20% Al2O3 composite material had the highest FNRC due to its higher density. The present investigation can be considered original in terms of a few aspects. Consequently, these new shielding materials can be chosen as shielding materials against gamma radiation. In addition to contributing to several popular technologies including space technologies and nanotechnology, the present study can also contribute to nuclear technology.

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In recent years, B 4 C particle reinforced Al matrix composite materials have been excessively used for gamma and neutron shielding regarding their neutron absorption and lightweight. In this paper, linear and mass attenuation coefficients using 80 keV, 356 keV, 137 Cs (662 keV), 60 Co (1173 keV,1332 keV) and 2000 keV(high energy) gamma energies for B 4 C (5-15 wt%) particle-reinforced Alumix 13 and Alumix 231 (which contains special alloy elements such as Cu and Mg) aluminum matrix composites were theoretically calculated with XCOM platform. Pair production, coherent scattering, photoelectric absorption and incoherent scattering processes besides the total attenuation coefficients for B 4 C (5-15 wt%) particle-reinforced Alumix 13 and Alumix 231 matrix composite materials were evaluated separately. On the other hand, half-value thickness (HVL) values and one-tenth thickness values (TVL) were also calculated to evaluate the radiation shielding effectiveness of this material excluding coherent scattering values that are frequently used in gamma ray transport theory as well as the total attenuation coefficients. Gamma attenuation curves for Al composite materials against 80 keV, 356 keV, 137 Cs (662 keV), 60 Co (1173 keV, 1332 keV) and 2000 keV (high energy) gamma energies were theoretically calculated and plotted for B 4 C (5-15 wt%) particle-reinforced Alumix 13 and Alumix 231 matrix composite materials. According to the obtained results for this material, radiation attenuation properties and the ability of shielding of materials were investigated. Therefore, this study is original from a variety of aspects, and its results may be used not only in nuclear technology but also in other technologies such as nano and space technology.

As a result of advances in science and technology, the importance of metal matrix composite materials is increasing gradually today. However, in many studies, composite production is carried out with monotype ceramic particle reinforcement. In this study, the production, microstructure-hardness, and wear performance of composite-hybrid materials that had AA 7075 aluminum powder metal matrix and were reinforced by SiC and Al2O3 ceramic particles at different ratios were examined. The prepared Matrix and reinforcement powder mixtures were mixed for half an hour in the three-axis Turbula T2F type mixer and then, pressed unidirectionally and cylindrically under the pressure of 700 MPa. The pressed samples were sintered for 1 h at a temperature of 600oC in the argon atmosphere. Microstructure examinations were carried out using SEM (Scanning Electron Microscope) and optical microscope devices, while hardness measurements were obtained as a result of Brinell measurement. Wear performance of the test samples were tested in the Pin-on-disk type device at 10 N load and 500 rpm rotation speed by depending on the wear distances at 1000, 1500 and 2000 m. It was observed that hardness increased as the amount of ceramic particle in composite-hybrid samples increased. As a result of wear tests, in hybrid composites, compared to single-phase ceramic particle reinforced composites, weight losses increased depending on the increase in the reinforcement amount.