爆炸加载TC4 ELI钛合金微损伤研究  

Research on micro-damage of TC4 ELI titanium alloy under explosive loading

作　　者：宋雨宸 王琳[1,2,3] 赵登辉[4] 吴江[5] 范丽静 张宇轩 程焕武 SONG Yuchen;WANG Lin;ZHAO Denghui;WU Jiang;FAN Lijing;ZHANG Yuxuan;CHENG Huanwu(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials Under Shock and Impact,Beijing Institute of Technology,Beijing 100081,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;China Ordnance Industrial Standardization Research Institute,Beijing 100089,China;Shaanxi Province Aerospace and Astronautics Propulsion Research Institute Co.Ltd.,Xi'an 710003,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]北京理工大学冲击环境材料技术国家级重点实验室,北京100081 [3]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [4]中国兵器工业标准化研究所,北京100089 [5]陕西空天动力研究院有限公司,陕西西安710003

出　　处：《兵器材料科学与工程》2024年第6期26-31,共6页Ordnance Material Science and Engineering

基　　金：国防基础科研计划项目(WDZC2022-4)。

摘　　要：用TNT炸药空中爆炸加载等轴组织TC4 ELI钛合金板材,研究爆炸药量及距靶板中心距离对钛合金显微组织演化的影响,测试了爆炸加载后材料的力学性能。结果表明:爆炸加载后TC4 ELI钛合金显微组织内产生了大量形变带,形变带宽度为10~120μm;随着爆炸药量从200 g提高到300 g,形变带的数量及总宽度增加,形变带边界更加清晰;随着距靶板中心距离的增加,形变带数量不变,宽度增加。对爆炸加载回收靶板采用分离式霍普金森压杆(SHPB)进行动态压缩再加载试验,随药量和距靶板中心距离的增加,钛合金静动态抗压强度与断裂应变增加。动态再加载后产生了绝热剪切转变带,形变带对转变带的萌生及扩展过程影响较小。The effects of explosive charge and distance from the center of the target plate on the microstructure evolution of isoaxial TC4 ELI titanium alloy plate were investigated.The mechanical properties of the material after explosive loading were tested.The results show that a large number of deform bands are produced in the alloy after explosive loading,with a width ranging from 10-120μm.With the charge increased from 200 g to 300 g,the number and the total width of deform bands will increase.Increase the distance from the center of the target plate,the number of deform bands remains constant and the width increases.Dynamic compression reloading tests were conducted by SHPB on the explosive loading recovered target plate.The static and dynamic compressive strength and fracture strain of titanium alloy increase with the increase of the charge and the distance from the center of the target plate.An adiabatic shear transformed band is generated after dynamic reloading.The deform band has little influence on the initiation and propagation of the transformed band caused by reloading.

关 键 词：TC4 ELI钛合金 爆炸加载 再加载力学性能 绝热剪切形变带 绝热剪切转变带 

分 类 号：TG146.23[一般工业技术—材料科学与工程]