Influence of the Number of Layers on the Notch Toughness of Layer Damascene or Welded Damascene Steel

Layer Damascene samples with, arithmetically, 13, 73, 145 and 973 layers were produced to determine the influence of the number of layers on the notch-impact toughness. The investigation studied the notch-impact strength of ISO-V samples at room temperature, the microstructure, and the fractography of the fracture surfaces. Carbon diffusion between layers and the loss of carbon resulting from the method of manufacture were analysed. It was shown that there is a clear tendency to higher notch-toughness values as the number of layers increases. [Example material: St37-3].