Abstract
The paper focus on the importance of heat treatment procedure of Ti10V2Fe3A alloy for the removal process during EDM. The goal of the research was to analyse the influence of Ti10V2Fe3Al alloy microstructure on the surface integrity after electrodischarge machining (EDM). By varying the time and temperature of the heat treatment operation the samples with various morphologies and a volume fraction of the α phase have been obtained. Then, all the samples were electrodischarge machined in sinking kinematics. The results analysis focuses on the microstructural changes, microhardness and geometrical properties of the machined surface. In the surface layer cross-section typical zones differing in chemical composition, microstructure and microhardness between samples with different initial morphologies and a volume fraction of the α phase were distinguished. Also significant differences in 3D surface roughness parameters such as Sa, Sz, Sq, Sk, obtained for each investigated sample after EDM were detected. Observed changes in surface layer corresponds to the temperature of heat treatment and annealing time and the resulting volume fraction of the α phase.
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