本文依据笔者对层状撕裂的研究,借助电子探针,扫描电镜以及其它检测手段观察了高强钢层状撕裂的断口形貌,探讨了钢板厚度方向性能对断口形态的影响。笔者所作的不同应力下系列拉伸试验,形象地导出了层状撕裂启始——扩展——剪切断裂的三个主要环节,为层状撕裂机制的深入研究提供了依据。 Based on the author’s research on lamellar tearing, the fracture morphology of high-strength steel layer tearing was observed by means of electron probe, scanning electron microscope and other detection methods. The influence of thickness direction of plate on fracture morphology was also discussed. The series of tensile tests conducted by the author under different stresses have vividly derived the three main links of the initial-extended-shear fracture of layered tearing, providing the basis for further study on the mechanism of layered tearing.