磁驱动飞片加载下纯铁的冲击相变和层裂特性

曹落霞 胡海波 陈永涛 王桂吉 汤铁钢

曹落霞, 胡海波, 陈永涛, 王桂吉, 汤铁钢. 磁驱动飞片加载下纯铁的冲击相变和层裂特性[J]. 高压物理学报, 2015, 29(4): 248-254. doi: 10.11858/gywlxb.2015.04.002
引用本文: 曹落霞, 胡海波, 陈永涛, 王桂吉, 汤铁钢. 磁驱动飞片加载下纯铁的冲击相变和层裂特性[J]. 高压物理学报, 2015, 29(4): 248-254. doi: 10.11858/gywlxb.2015.04.002
CAO Luo-Xia, HU Hai-Bo, CHEN Yong-Tao, WANG Gui-Ji, TANG Tie-Gang. Shock-Induced Phase Transition and Spallation in Pure Iron under Magnetically Driven Flyer Plate Loading[J]. Chinese Journal of High Pressure Physics, 2015, 29(4): 248-254. doi: 10.11858/gywlxb.2015.04.002
Citation: CAO Luo-Xia, HU Hai-Bo, CHEN Yong-Tao, WANG Gui-Ji, TANG Tie-Gang. Shock-Induced Phase Transition and Spallation in Pure Iron under Magnetically Driven Flyer Plate Loading[J]. Chinese Journal of High Pressure Physics, 2015, 29(4): 248-254. doi: 10.11858/gywlxb.2015.04.002

磁驱动飞片加载下纯铁的冲击相变和层裂特性

doi: 10.11858/gywlxb.2015.04.002
基金项目: 国家自然科学基金(11272006)
详细信息
    作者简介:

    曹落霞(1987-),男,硕士研究生,主要从事冲击相变动力学研究.E-mail: 1009846207@qq.com

    通讯作者:

    胡海波(1963-),男,博士,研究员,主要从事流体动力学研究.E-mail: huhaibo@caep.cn

  • 中图分类号: O347.3

Shock-Induced Phase Transition and Spallation in Pure Iron under Magnetically Driven Flyer Plate Loading

  • 摘要: 使用磁驱动装置CQ-4发射紫铜飞片对纯铁样品进行一维平面应变加载,采用高精度激光位移干涉仪(DPS)记录飞片和样品的自由面速度历史。结果显示,当纯铁样品在加、卸载过程中有αε相变发生时,样品的层裂强度达到3.4 GPa,比已报道的未发生相变的纯铁的层裂强度(1.2~1.9 GPa)有明显提高,其原因可能是纯铁材料在经历αε可逆相变时,内部晶格产生了大量的位错。通过分析样品的自由面速度历史,判断出样品发生了自由面浅表层裂现象。在对飞片和样品中的应力波系进行分析时,若只考虑塑性波和相变波在界面的反射稀疏波与飞片传入样品靶中的稀疏波之间的相互作用,将无法解释实验观测到的自由面浅表层裂现象,因此该现象可能与纯铁样品在逆相变过程中产生稀疏冲击波有关。

     

  • 图  实验负载区示意图

    Figure  1.  Schematic of the experimental loading part

    图  实验1中飞片的自由面速度剖面

    Figure  2.  Free-surface velocity profiles of the flyer in Exp.1

    图  实验2中飞片的自由面速度剖面和位移-时间曲线

    Figure  3.  Free-surface velocity profiles and displacement-time curve of the flyer in Exp.2

    图  实验3中镀膜窗口界面的粒子速度历程

    Figure  4.  Interface particle velocity history of the coating window

    图  飞片撞击镀膜窗口后飞片中的波系示意图

    Figure  5.  Wave system in the flyer after impacting the coating window

    图  纯铁样品的自由面速度剖面

    Figure  6.  Free surface velocity profile of the pure iron specimen

    图  飞片-样品可能的波系结构

    Figure  7.  Possible stress wave systems in the flyer-specimen

    表  1  实验参数

    Table  1.   Experimental parameters

    Exp.No. Flyer size/
    (mm×mm×mm)
    Specimen size/
    (mm×mm)
    dAl/(μm) U/(kV) v /(m/s) pmax/(GPa) Remarks
    1 23×12×1.3 75 1 594 Testing for planarity and velocity
    2 23×12×1.3 65 1 325 Testing for planarity and velocity
    3 23×12×1.3 Ø8.0×0.8 1.5 65 1 302 28.1 Loading on the Fe specimen
    下载: 导出CSV

    表  2  样品和飞片的材料参数

    Table  2.   Material parameters of the specimen and flyer

    Material Density/(g/cm3) Hugoniot parameters Longitude sound velocity/(km/s)
    c0/(km/s) λ
    Fe (Specimen) 7.85 4.63 1.33 5.97
    Cu (Flyer) 8.93 3.94 1.49 4.76
    下载: 导出CSV
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出版历程
  • 收稿日期:  2013-09-27
  • 修回日期:  2013-12-03

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