This propose of this subject is to research the damage mechanism of materials, especially structural and functional materials in advanced nuclear energy system, under heavy ion irradiation. It includes:(1)The structural evolution of materials under heavy ion irradiation and its evolution mechanism, the effects of grain boundary and interface on the suppression of defects and bubbles;(2)The irradiation effects of materials under multi-particles irradiation and the synergy effects of He/ H/ dpa;(3)the compari...