• Nguyen-Manh, Duc
• Wróbel, Jan S.
• Wang, Yongqiang
• Fensin, S.
• Baldwin, J. K. S.
• Tukac, O. U.
• Vo, H. T.
• Martinez, E.
• Li, M.
• Gigax, J.
• Krienke, N.
• Lee, C.
• Aydogan, E.
• Chen, W.-Y.
• Tunes, Matheus Araujo

Abstract

<jats:title>Abstract</jats:title><jats:p>In the quest of new materials that can withstand severe irradiation and mechanical extremes for advanced applications (<jats:italic>e.g</jats:italic>. fission &amp; fusion reactors, space applications, etc.), design, prediction and control of advanced materials beyond current material designs become paramount. Here, through a combined experimental and simulation methodology, we design a nanocrystalline refractory high entropy alloy (RHEA) system. Compositions assessed under extreme environments and in situ electron-microscopy reveal both high thermal stability and radiation resistance. We observe grain refinement under heavy ion irradiation and resistance to dual-beam irradiation and helium implantation in the form of low defect generation and evolution, as well as no detectable grain growth. The experimental and modeling results—showing a good agreement—can be applied to design and rapidly assess other alloys subjected to extreme environmental conditions.</jats:p>

Topics

• grain
• simulation
• defect
• refractory
• grain growth
• microscopy