Interaction of radiation-induced defects with tungsten grain boundaries at across scales: a short review
作者机构：Key Laboratory of Materials PhysicsInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials(Ministry of Education)Shandong UniversityJinan 250061China
出 版 物：《Tungsten》 (钨科技（英文）)
年 卷 期：2020年第2卷第1期
页 面：15-33页
核心收录：
学科分类：07[理学] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
基 金：This work was financially supported by the National Key Research and Development Program of China(Grant Nos.2017YFE0302400,2017YFA0402800,and 2018YFE0308102) the National Natural Science Foundation of China(Grant Nos.11735015,51871207,51671185,U1832206,51771181,U1967211 and 51971212) the Center for Computation Science,Hefei Institutes of Physical Sciences
主 题：Nano-crystalline Grain boundary Radiation-resistance Self-healing Radiation damage Tungsten
摘 要：As promising candidates for plasma-facing materials,tungsten-based materials suffer the irradiation of high-energy neutrons in addition to the hydrogen isotopes and helium irradiation and the high-thermal ***-produced defects,***-interstitial atoms(SIAs)and vacancies(Vs),can induce the hardening and embrittlement of tungsten,meanwhile enhancing the retention of hydrogen isotopes and helium in *** the grain size of materials to introduce a high density of defect sinks,e.g.,grain boundaries(GBs)prevalent in nano-/ultrafine-crystalline materials,was demonstrated to be an effective approach for mitigating irradiation damage in *** this paper,we reviewed the theoretical advances in exploring radiation-resistance of nano-structured tungsten at across *** was concentrated on the results of molecular dynamics,molecular statics,and the object kinetic Monte Carlo simulations on the fundamental interaction of the radiation-created Vs and SIAs with the *** mechanisms include GB-promoted V/SIA migration and SIA-V recombination,interstitial-emission induced annihilation,coupling of the V migration close to the GB with the SIA motion within the GB,and interstitial reflection by the locally dense GB *** proposed the remaining scientific issues on the defect-GB interactions at across scales and their relation to experimental *** prospected the possible trends for simulating the radiation damage accumulation and healing processes in nano-structured tungsten in terms of the development of the across-scale computational techniques and efficiency of the GB-enhanced tolerance of tungsten to irradiation under complex in-service conditions.
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