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利用Hopkinson杆,以装甲钢、纯铜及IF钢为材料,采用设计的帽型样尺寸,在不同压力下进行高速冲击,利用EBSD分析其在高应变率变形下的剪切带的特征。结果表明,应变率为104s-1,装甲钢绝热剪切带呈现白亮带状,纯铜及IF钢剪切带宽度较宽且不耐浸蚀。3种材料剪切带内均存在细小等轴晶,装甲钢形成的剪切带取向较分散,但存在稍强的剪切坐标系下的{110}<111>织构,纯铜存在{111}<110>织构,IF钢形成{110}<111>织构。装甲钢抗绝热剪切的性能优于纯铜及IF钢。
Using Hopkinson bar, armored steel, pure copper and IF steel as materials, the designed hat-shaped dimensions were used to carry out high-speed impact at different pressures. The shear band characteristics under high strain rate deformation were analyzed by EBSD. The results show that the strain rate is 104s-1, the adiabatic shear bands of armored steel appear white bright band, the width of shearing band of pure copper and IF steel is wide and not resistant to corrosion. Small equiaxed grains exist in the shear bands of all three kinds of materials. The shear bands formed by the armored steel are more dispersed, but {110} <111> texture exists in a slightly stronger shear coordinate system. The existence of {111 } <110> texture, the IF steel forms a {110} <111> texture. Armored steel anti-adiabatic shear performance is better than pure copper and IF steel.