Thermal debonding of inclusions in compacted graphite iron: Effect of matrix phases

This paper investigates graphite decohesion as the primary fracture mechanism of compacted iron (CGI) subjected to thermal load. Despite CGI’s extensive industrial use and considerable research on its mechanical behaviour, debonding is not yet fully understood, nor influence matrix phases it. After cycling confirm occurrence phenomenon, a numerical approach developed: 2D unit cell constructed, with single particle, represented an ellipse embedded in metallic matrix. The inclusion surrounded by extra layer that accounts for either pearlite or ferrite, order study their effect debonding. An elastoplastic behaviour assumed all constituents, described classical J2 flow theory plasticity, models are analysed employing finite-element approach. proposed strategy focuses debonding, identifying schemes assess obtained results can provide significant knowledge response CGI load at microscale, contributing understanding macroscopic thermomechanical behaviour.