Analyse de l'état mécanique et microstructural des zones de frottement outil-copeau et outil-pièce en tournage

Application of the EBSD technique for the characterisation of deformation zones in metal cutting

“…8, the presence of slip lines within the deformed grains in the chip is clearly visible where two crystallographic slip systems were activated. This confirms the results reported in a previous investigation [18,19] where such deformation features were observed during metallographic inspection of similar austenitic chip specimens.…”

“…Fig. 9a also has strong similarities with the experimental pole figures obtained by Changeux et al [18] based on X-ray diffraction analysis of tool-chip and tool-work friction zones in carbon steel XC42 (Fig. 9b).…”

“…body-centered cubic) with the one computed from texture simulation model (Fig. 9c) [18] revealed the predominance of simple shear as the main deformation mode. The favourable comparison of our experimental pole figures on FE material with those obtained by Changeux et al on XC42 suggests therefore a similar deformation mode.…”

“…Results indicated a significant change in the crystallographic texture observed in the deformed zones that were often correlated to those observed in cold rolling processes [15,16,18,19]. Further comparisons between experimental textures induced by machining and results from texture simulation models revealed the predominance of simple shear as a deformation mode [18,19,22].…”

“…X-ray diffraction technique has been attempted for studying changes in microstructure and deformation textures of surfaces produced by metal cutting [14][15][16][17][18][19][20][21]. Results indicated a significant change in the crystallographic texture observed in the deformed zones that were often correlated to those observed in cold rolling processes [15,16,18,19].…”