Influence of homogenisation treatments on the hot ductility of cast ATI® 718Plus®: Effect of niobium and minor elements on liquation characteristics

The hot ductility of cast ATI® 718Plus® was assessed using the Gleeble thermo-mechanical simulator after being subjected to different homogenisation heat treatments. deteriorated significantly long-dwell treatments for 24 h at temperatures 1120 and 1190 °C as compared with those treated a short dwell time 4 same temperatures. observed deterioration related more extensive liquation along grain boundaries caused by mechanisms, e.g., solute segregation mechanism, Laves melting, constitutional MC carbides supersolidus boundary effect extent depending on changes Furthermore, role Nb element precipitate former, well minor alloying elements segregating boundaries, is discussed in connection liquation, which contributes better understanding heat-affected zone cracking susceptibility 718Plus®.