冲击加载-卸载-再加载条件下Cr-Ni-Mo钢的层裂损伤  

Spall Damage of Cr-Ni-Mo Steel under Shock-Release-Reloading Conditions

作　　者：洪逸非 李绪海[2] 吴凤超 张昭国 张建[1] 陈森 王媛[2] 俞宇颖[2] 胡建波[2] HONG Yifei;LI Xuhai;WU Fengchao;ZHANG Zhaoguo;ZHANG Jian;CHEN Sen;WANG Yuan;YU Yuying;HU Jianbo(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,Hubei,China;National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China)

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070 [2]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《高压物理学报》2024年第5期114-123,共10页Chinese Journal of High Pressure Physics

基　　金：国家重点研发计划(2021YFB3802303)。

摘　　要：基于一级轻气炮加载技术,利用不同类型的多层复合飞片,实现了冲击加载-卸载-再加载路径,结合回收表征以及一维流体力学模拟,对Cr-Ni-Mo钢在冲击加载-卸载-再加载路径下的层裂损伤行为进行了深入研究。结果表明,在冲击加载-卸载-再加载路径下,层裂面会重新闭合并形成微损伤带,而孔洞位置仍然位于原奥氏体边界和板条群边界处,裂纹仍保持穿晶+沿晶的混合断裂模式。此外,第1层飞片与样品之间存在的较大阻抗差异会导致自由面速度中的再加载信号缺失。这些发现为深入理解Cr-Ni-Mo钢在复杂加载路径下的层裂行为提供了重要参考。In this work,plate-impact experiments,postmortem characterizations and one-dimensional hydrodynamic simulations were conducted to investigate the spall behavior of Cr-Ni-Mo steel under complex shock loading paths.Multi-layer flyers were utilized to generate the complex shock-releasereloading paths.Re-closed spall plane and mitigated damage zones were observed after recompression.Voids nucleate at the austenite grain boundaries and packet boundaries,which is consistent with the observations in single-shock experiments.The damage behavior is characterized by a mixed mode with both transgranular and intergranular characteristics.Moreover,notable impedance mismatch between different flyer layers can lead to the absence of reloading signal in the free surface velocity profiles.These findings can provide us insights into the spall behavior of Cr-Ni-Mo steel under complex loading conditions.

关 键 词：Cr-Ni-Mo钢 层裂 冲击加载 再加载 加载路径 

分 类 号：O346.4[理学—固体力学] O521.2[理学—力学]