Ta-Hf-Nb-Zr体系高熵合金J-C模型及应用试验

李海峰 门建兵 金文 刘旭东

李海峰, 门建兵, 金文, 刘旭东. Ta-Hf-Nb-Zr体系高熵合金J-C模型及应用试验[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0069
引用本文: 李海峰, 门建兵, 金文, 刘旭东. Ta-Hf-Nb-Zr体系高熵合金J-C模型及应用试验[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0069
LI Haifeng, MEN Jianbing, JIN Wen, LIU Xudong. J-C model of high-entropy alloy Ta-Hf-Nb-Zr system and its application test[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0069
Citation: LI Haifeng, MEN Jianbing, JIN Wen, LIU Xudong. J-C model of high-entropy alloy Ta-Hf-Nb-Zr system and its application test[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0069

Ta-Hf-Nb-Zr体系高熵合金J-C模型及应用试验

doi: 10.11883/bzycj-2024-0069
基金项目: “叶企孙”科学基金(U2241234)
详细信息
    作者简介:

    李海峰(1998- ),男,硕士研究生,lihaifeng3815@163.com

    通讯作者:

    门建兵(1973- ),男,博士,教授,menjb@bit.edu.cn

  • 中图分类号: O389; TJ410.4

J-C model of high-entropy alloy Ta-Hf-Nb-Zr system and its application test

  • 摘要: 针对包含高密度、高热值元素的高熵合金材料在聚能战斗部药型罩上的应用问题,选取Ta-Hf-Nb-Zr体系高熵合金为研究对象,采用INSTRON材料试验机、分离式霍普金森压杆试验平台,探寻该高熵合金在应变率为10−3~103 s−1、温度为25~900 ℃以及应力三轴度为0.33~0.89条件下的力学响应规律,基于静动态力学性能试验结果,获取该合金的Johnson-Cook(J-C)本构方程参数及损伤失效模型参数,并建立爆炸加载下高熵合金爆炸成型弹丸(explosively formed projectile,EFP)数值模型。开展EFP成型脉冲X射线验证试验,结果显示:117 μs时,高熵合金EFP成型较为完整,EFP长度为51.1 mm,直径为12.27 mm;187 μs时,EFP尾部产生3处断裂,头部长度为24.3 mm,直径为12.27 mm,EFP速度为2496.3 m/s。模拟与试验的EFP长度、直径以及速度的误差均小于8.2%,模拟的断裂形态与试验结果基本一致,J-C模型有效预测了爆炸加载条件下高熵合金EFP的成型状态。
  • 图  1  光滑及带缺口圆棒试件

    Figure  1.  Smooth and notched round bars specimens

    图  2  不同应变率下光滑圆棒的静态应力-应变曲线及拉断试件

    Figure  2.  Static stress-strain curves of smooth round bars under different strain rates and specimens with tensile fracture

    图  3  不同缺口半径下带缺口圆棒试件的静态力-位移曲线及拉断试件

    Figure  3.  Static force-displacement curves of notched round bar specimens with different notch radii and specimens with tensile fracture

    图  4  不同温度下带光滑圆棒试件的静态应力-应变曲线及拉断试件

    Figure  4.  Static stress-strain curves of smooth round bars at different temperatures and specimens with tensile fracture

    图  5  动态压缩试件

    Figure  5.  Dynamic compression specimen

    图  6  SHPB试验平台

    Figure  6.  SHPB testing platform

    图  7  不同应变率下高熵合金的动态应力-应变曲线

    Figure  7.  Dynamic stress-strain curves of HEA at different strain rates

    图  8  高温高应变率下合金的应力-应变曲线

    Figure  8.  Stress-strain curves of alloy under high temperature and high strain rate

    图  9  失效应变与应力三轴度的关系

    Figure  9.  Relationship between fracture strain and stress triaxiality

    图  10  失效应变与无量纲应变率的关系

    Figure  10.  Relationship between fracture strain and the logarithmic non-dimensional strain rate

    图  11  失效应变与温度的关系

    Figure  11.  Relationship between fracture strain and temperature

    图  12  EFP装药的结构示意图

    Figure  12.  Geometric model of EFP charge structure

    图  13  EFP成型数值计算的网格模型

    Figure  13.  Grid model for numerical calculation of EFP forming

    图  14  EFP战斗部的部件

    Figure  14.  Components of EFP warhead

    图  15  脉冲X射线成像示意图

    Figure  15.  Schematic diagram of pulse X-ray imaging

    图  16  X射线成像试验的场地布置

    Figure  16.  Layout of X-ray imaging test site

    图  17  数值模拟与脉冲X射线试验的EFP成型形态对比

    Figure  17.  Comparison of EFP forming morphology between numerical simulation and pulsed X-ray testing

    表  1  不同应变率下光滑圆棒试件的失效应变

    Table  1.   Failure strain of smooth round bar specimens at different strain rates

    试件编号应变率/s−1εf
    1-10.0010.67
    1-20.0100.73
    1-30.0500.86
    1-40.1000.87
    下载: 导出CSV

    表  2  不同缺口半径下缺口试件的失效应变

    Table  2.   Failure strain of notch specimens under different notch radii

    试件编号 σ* εf
    2-1 0.89 0.35
    2-2 0.74 0.46
    2-3 0.56 0.53
    2-4 0.47 0.50
    2-5 0.43 0.55
    2-6 0.33 0.67
    下载: 导出CSV

    表  3  高温拉伸试验中光滑圆棒试件的失效应变

    Table  3.   Failure strain of smooth round bar specimens in high temperature tensile test

    试件编号 温度/℃ εf
    3-1 100 0.60
    3-2 300 0.34
    3-3 500 0.17
    3-4 700 0.08
    下载: 导出CSV

    表  4  不同应变率下高熵合金的屈服强度

    Table  4.   HEA yield stress under different strain rates

    应变率/s−1 屈服强度/MPa
    2160 639.1
    3000 648.4
    3600 650.8
    4200 679.0
    下载: 导出CSV

    表  5  不同温度条件下高熵合金的屈服强度

    Table  5.   Variation of yield strength of HEA under different temperatures

    温度/℃ 屈服强度/MPa
    300 353.7
    700 295.3
    800 248.9
    900 233.7
    下载: 导出CSV

    表  7  药型罩材料的J-C本构方程参数

    Table  7.   J-C constitutive equation parameters for liner materials

    A/MPa B/MPa n C m
    270.2 571.3 0.79 0.062 0.638
    下载: 导出CSV

    表  6  药型罩材料的Grüneisen状态方程参数[5]

    Table  6.   Grüneisen state equation parameters for liner materials

    ρ/(g·cm−3) γ C0/(m·s−1) S
    11.7 1.1147 3213.0 1.1218
    下载: 导出CSV

    表  8  药型罩材料的J-C失效方程参数

    Table  8.   J-C failure equation parameters for liner materials

    D1 D2 D3 D4 D5
    0.24 0.78 −1.98 0.076 −3.269
    下载: 导出CSV
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  • 收稿日期:  2024-03-11
  • 修回日期:  2024-07-25
  • 网络出版日期:  2024-08-13

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