通过测量材料力学性能和观察断口形貌,讨论铜石墨材料断口形貌中的瓦纳线与材料断裂特 性的关系,发现瓦纳线是铜石墨材料韧性断裂的标志;结合材料微观结构特性,分析应力波的传播及其对 材料的作用,认为瓦纳线是横波在材料中传播所引起的塑性变形。 By measuring the mechanical properties of the material and observing the fracture morphology, the relationship between the breaking strength of the material and the rupture behavior of the graphite-graphite material was discussed. It was found that the Vanessa line is a sign of the ductile fracture of the copper-graphite material. Combining with the microstructural characteristics of the material, Stress wave propagation and its role in the material, that the line of Wanna is the shear wave propagation in the material caused by plastic deformation.