图  1  多向轧制样品与单向轧制样品的EBSD及XRD谱

Figure  1.  EBSD and XRD pattens of multi-direction rolling samples and unidirectional rolling samples

图  2  多向轧制样品与单向轧制样品的取向成像图、晶粒尺寸统计、极图及反极图

Figure  2.  Orientation imaging maps, grain size distribution, pole figures, and inverse pole figures of multi-directional sample and unidirectional rolling sample

图  3  基于真空下的液氦超低温冲击系统

Figure  3.  Vacuum-operated cryogenic liquid helium impact testing system

图  4  典型波形（298 K，$ \dot{\varepsilon } $=5 000 s^–1）

Figure  4.  Typical wave (298 K，$ \dot{\varepsilon } $=5 000 s^–1)

图  5  多向轧制样品在不同应变率和不同温度下的应力-应变

Figure  5.  Stress-strain of multi-directional rolling samples at different strain rates and different temperatures

图  6  多向轧制样品的拉压对称性（$ \dot{\varepsilon } $=5 000 s^–1）

Figure  6.  Tensile and compressive symmetry of multi-directional rolling samples ($ \dot{\varepsilon } $=5 000 s^–1)

图  7  单向轧制样品在不同应变率和不同温度下的应力-应变

Figure  7.  Stress-strain of unidirectionally rolling samples under different strain rates and temperatures

图  8  多向轧制样品与单向轧制样品压缩后的表面表征（298 K、$ \dot{\varepsilon } $=5 000 s^–1）和多向轧制样品的EBSD分析

Figure  8.  Surface characterization of multi-directional rolling and unidirectional rolling samples after compression and and EBSD analysis of unidirectional rolling samples (298 K，$ \dot{\varepsilon } $=5 000 s^–1)

图  9  拉压实验后多向轧制样品截面的SEM表征（$ \dot{\varepsilon } $=5 000 s^–1）

Figure  9.  SEM characterization of the cross-section of multiaxial rolling samples after tensile and compressive experiments ($ \dot{\varepsilon } $=5 000 s^–1)

图  10  J-C模型拟合的应力-应变曲线与实验结果的对比

Figure  10.  Comparison between the stress-strain curve fitted by the J-C model and experimental results