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研究了钨合金破片对低碳钢板高速侵彻过程中的失效行为及诱发机制。通过弹道枪实验获得93W、95W 2种球形钨合金破片以大于1500 m/s的速度对Q235A钢板侵彻后的物理形态,对侵彻后受损破片进行了扫描电镜(SEM)观察与分析。结果表明:对于Q235A钢板,钨合金破片以大于1500 m/s的速度侵彻后,93W钨颗粒是韧窝型穿晶断裂,而95W钨颗粒是准解理型穿晶断裂;93W、95W合金破片局部均会发生熔化,50μm钨颗粒熔化冷凝后生成10μm以下的微米、亚微米尺度球形颗粒紧密排列,宏观上表现为破裂碎块的整体侵彻。
The failure behavior and mechanism of tungsten alloy rupture during high-speed penetration of mild steel sheets were studied. Ballistic gun experiments were carried out to obtain the physical morphology of Q235A steel plate after 93W, 95W two types of spherical tungsten alloy fragments were penetrated at a speed of more than 1500 m / s. Scanning electron microscopy (SEM) observation and analysis were performed on the damaged fragments after penetrating. The results show that 93W tungsten particles are dimple-like transgranular fracture, and 95W tungsten particles are quasi-cleaved transcrystalline fracture. For 93W, 95W alloy Local fragmentation will occur melting, 50μm tungsten particles fused to form 10μm below the micron, submicron-scale spherical particles arranged closely, macroscopically the overall breakdown of broken pieces of penetration.