钛合金室温冲击韧性及微观失效机理研究进展-中国材料进展

文章信息/Info

Title:: Research Progress of Impact Toughness and Microscopic Failure Mechanism of Titanium Alloys at Room Temperature

作者:: 赵润泽; 樊江昆; 张文渊; 张智鑫; 李渤渤; 蒋鹏; 寇宏超; 李金山; 1. 西北工业大学凝固技术全国重点实验室，陕西西安 710072 2. 先进金属材料精确热成型技术国家地方联合工程研究中心，陕西西安 710072 3. 西北工业大学重庆科创中心，重庆 401135 等.

Author(s):: ZHAO Runze; FAN Jiangkun; ZHANG Wenyuan; ZHANG Zhixin; LI Bobo; JIANG Peng; KOU Hongchao; LI Jinshan; 1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China 2. National & Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials, Xi’an 710072, China 3. Chongqing Innovation Center, Northwestern Polytechnical University,Chongqing 401135, China et al.

Keywords:: titanium alloy; impact toughness; deformation failure; crack initiation and propagation; alloy element; microstructure

摘要:: 钛合金材料因其卓越的力学性能而在航空、航天、航海等诸多领域得到广泛应用。然而，钛合金结构在实际服役过程中常常会受到各种动态冲击载荷的影响，如船舶遭受碰撞冲击、飞机起落架在升降时的瞬时冲击等。这些冲击载荷可能导致合金构件因较低的冲击韧性而发生断裂。因此，为预防钛合金材料在服役过程中因失效而引发事故，冲击韧性被视为关键的设计指标之一。从位错激活、形变孪生、裂纹萌生及扩展等多个角度，综述了合金元素与不同微观组织结构在室温条件下对钛合金冲击韧性与微观变形失效机理的影响。基于现有研究成果的分析讨论，总结了钛合金室温冲击韧性研究面临的挑战，并对未来冲击韧性改善及其微观机理研究进行展望。

Abstract:: 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 micromechanism research are presented.