Analysis of Fractures of Metal Ceramic Hard Alloys of KNT Brand

Resumo

Intrinsic features of the fractures of metal ceramic hard alloys (cermets) of KNT3, KNT7, and KNT12 brands have been studied. The fractures have been obtained as a result of strength tests of the alloys using a three-point bending test. Because there are few data on the fracture surface of cermets in the scientific literature, the data from the analysis of the fractograms of steel products have been used to determine general intrinsic features of fractures. Analysis of the fractograms of the cermets has proved the reasonability of this approach and has shown that intrinsic features of fractures of the cermets are mainly analogous to those of steel products and can be classified by the definitions similar to steel products.