钛合金室温冲击韧性及微观失效机理研究进展

Titanium alloys have been widely used in aerospace, marine and other engineering fields due to their excellent mechanical properties. However, these alloys are frequently subjected to dynamic impact loads during service, such as wave impacts on ship structures or instantaneous shocks during aircraft landing gear operating. Such impact loading may lead to catastrophic failure due to insufficient impact toughness. Therefore, to prevent accidents caused by the failure of titanium alloys during service, impact toughtness is regarded as one of the key design criteria. This review systematically summarizes the effects of alloying elements and microstructural characteristics on the impact toughness and microscopic deformation failure mechanism of titanium alloys under room-temperature conditions, with a focus on dislocation activation, deformation twinning, crack initiation and propagation. Finally, based on the analysis and discussion of existing research results, current challenges in improving the impact toughness of titanium alloys are summarized, and the prospects for future improvement of impact toughness and its micromechanism research are presented.