金属材料力学性能的辐照氦效应研究进展

金属材料在辐照过程中会发生嬗变反应，从而在材料内部形成氦泡，进而影响金属材料的宏观力学行为。因此，开展氦影响下金属材料力学性能的研究对抗辐照材料的设计及工程应用具有重要意义。氦对材料力学行为的影响是一个典型的多尺度问题，故本文从从原子尺度到宏观尺度针对含氦金属材料力学行为的研究方面进行了总结，主要包括氦原子的产生、氦团簇/氦泡的形成、氦泡在材料中的微观行为以及氦对材料宏观力学性能的影响。在此基础上，展望了该领域中存在的主要科学问题。

Research progress of irradiated helium effect on mechanical properties of metallic materials

Investigation on the mechanical behaviors of irradiated metallic materials with helium effect have much significance for the design of anti-irradiation materials and engineering application. During the high energy neutron irradiation process, helium (He) bubbles can be produced in metallic materials through nuclear transmutation reactions. The plastic deformation behavior of irradiated materials can be significantly affected by the presence of helium bubbles. Hence, we summarized the research on the mechanical behaviors of metallic materials with helium effect from the atomic scale to the macro scale, including the generation of helium atoms, the formation of helium clusters/helium bubbles, the microscopic behavior of helium bubbles in materials and the influence of helium on the macroscopic mechanical properties of materials. Finally, some scientific problem for future study are also presented.