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Microstructural Damage Evolution in Advanced Shielding Materials under Neutron and Gamma Irradiation |
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PP: 125-129 |
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doi:10.18576/jrna/110201
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Author(s) |
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Nisha Raj,
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Abstract |
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| The long-term performance of shielding materials in high-radiation environments depends not only on their attenuation capabilities but also on their microstructural stability under irradiation. This study examines microstructural damage evolution in tungsten, stainless steel (SS316L), and tungsten–polymer nanocomposites exposed to neutron and gamma fluxes. Using Monte Carlo simulations with GEANT4 and SRIM, displacement per atom (dpa) and energy deposition profiles were determined for each material, followed by comparative microstructural analysis using transmission electron microscopy (TEM) and hardness measurements. Tungsten exhibited dense dislocation networks and void formation, whereas high-entropy alloys (HEAs) and nanocomposites demonstrated improved defect tolerance due to lattice distortion and interfacial defect trapping. Results indicate that HEAs and nanocomposites can substantially mitigate irradiation-induced hardening and embrittlement, offering significant potential for nuclear, aerospace, and accelerator shielding applications. |
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