On the measurement of phase-related properties for modeling the tool damage in a microscopic scale

Abstract:
 
An on-going collaborative project involving Institue for Technological Research IPT, Iniversity od São Paulo and Gerdau aims to model the progressive damage of hot working tools using physical and mechanical properties of the micro-constituents of the tool materials with “engineering microstructure” for high performance hot working tools. One of the tool material studied is a cast alloy with chemical composition based on the matrix steel concept, that is, a base Fe-V-Mo-W-Cr-C composition and Nb+C stoichiometric additions. The microstructure of the cast alloy is composed of tempered martensite matrix and dispersed eutectic NbC carbides. This work describes the techniques used for measuring mechanical and physical properties of those phases at room and high temperatures, and corresponding results. The measured parameters are Modulus of Elasticity and Hardness, through instrumented indentation and Thermal Diffusivity, through laser flash method.

Reference:
BOCCALINI JUNIOR, Mario; TERTULIANO, Ana Julia; BRAGA, Ana Paola Villalva; MACHADO, Isabel Fernanda; SOUZA, Roberto Martins de. On the measurement of phase-related properties for modeling the tool damage in a microscopic scale. In: INTERNATIONAL TOOLING CONFERENCE, 10., 2016, Bratislava, Eslováquia. Proceedings… 8 p. 

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