(1. 北京理工大学 材料科学与工程学院 冲击环境材料技术重点实验室，北京 100081；
2. 中国兵器工业集团 第52研究所 烟台分所，烟台 264003)
摘 要: 通过终点弹道实验，使用7.62 mm AP和长杆型穿甲弹垂直侵彻β区和α+β区锻造的40 mm厚的Ti-6Al-4V钛合金靶板。结果表明：经α+β两相区锻造的Ti-6Al-4V钛合金靶板抗弹性能优于经β区锻造的Ti-6Al-4V钛合金靶板；长杆型穿甲弹对α+β两相区锻造的具有等轴组织的双层Ti-6Al-4V钛合金靶板的侵彻过程是弹体和靶板材料的相互消耗的过程，绝热剪切带的萌生扩展及其带内微裂纹的成核长大导致Ti-6Al-4V钛合金靶板弹坑附近材料的碎化破坏。
关键字: Ti-6Al-4V钛合金；热加工工艺；抗弹性能
（1. National Key Laboratory of Science and Technology on Materials under Shock and Impact,
School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;
2. Yantai Branch of No. 52 Institute, China Ordnance Industry Group, Yantai 264003, China）
Abstract:The β region and α+β region forged Ti-6Al-4V plates with a thickness of 40 mm were impacted by 7.62 mm AP and long-rod penetrator. The ballistic performance of Ti-6Al-4V target forged in α+β region is optimum than that of the Ti-6Al-4V target forged in β region. Further, post ballistic metallurgical observations find that the white-etching bands occur both in the β region and α+β region forged Ti-6Al-4V targets impacted by 7.62 mm AP, and deformed bands only occur in target forged in α+β region. In the α+β region forged equiaxed Ti-6Al-4V target impacted by long-rod penetrator, the penetration of the projectile is a process of eroding of the penetrator and fragmentation of the target, in which adiabatic shear bands and adiabatic shear band cause cracks.
Key words: Ti-6Al-4V alloy; thermo-mechanical processing; ballistic performance
