Experimental-numerical Analysis of Mechanisms of Damage Initiation in Tool Steels
نویسندگان
چکیده
SEM in-situ investigations of the micromechanisms of damage initiation and fracture in tool steels are described. The critical state of the material and the damage growth were observed in the tests. It was shown that the initial microcracks in the steels are formed in primary carbides and then join together. A hierarchical finite element model of damage initiation, which included a macroscopic model of the deformation of the specimen under real experimental conditions and a mesomechanical model of damage in real microstructures of steels was developed. Using the hierarchical model, the conditions of local failure in the steels have been obtained.
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