首页|Radiation-assisted chemical short-range order formation in high-entropy alloys
Radiation-assisted chemical short-range order formation in high-entropy alloys
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NSTL
Elsevier
? 2022 Acta Materialia Inc.The chemical short-range order (CSRO) in a face-centered cubic equiatomic NiCoFeCrMn high-entropy alloy was revealed directly from advanced transmission electron microscopy in this work. Further, instead of controlling CSRO by conventional heat treatment, we show a new possibility of tailoring CSRO by radiation. The multiple types of atoms in such high-entropy system are more prone to form CSRO under radiation compared to that only under thermodynamic equilibrium conditions, due to the rearrangement of the chemical ordering during the non-equilibrium thermal spike period and the radiation-enhanced diffusion mechanism. Our results show an increase in the fraction of CSRO area by ～45% after high-temperature irradiation with a dose of 50 DPA. Accordingly, we demonstrated that enhanced CSRO can be achieved by controlling the irradiation dose and temperature, which provides a new route to explore the kinetic evolution and effect of CSRO in complex alloy systems.
Chemical short-range orderHigh-entropy alloyRadiation-enhanced diffusionTransmission electron microscopy
Su Z.、Shi T.、Wang S.、Lu C.、Shen H.、Jiang L.、Wu L.、Song M.、Li Z.
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Department of Nuclear Science and Technology Xi'an Jiaotong University
Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
School of Materials Science and Engineering Dalian University of Technology
The First Sub-institute Nuclear Power Institute of China
Department of Nuclear Engineering and Radiological Sciences University of Michigan
School of Materials Science and Engineering Central South University
NSTL
Elsevier
