Varestraint weldability testing of cast ATI® 718Plusa comparison to cast Alloy 718

Varestraint testing of the newly developed cast ATI (R) 718Plus after pseudo-HIP (hot isostatic pressing) heat treatments showed that the extent of solidification cracking was independent of the heat treatment condition. The susceptibility towards heat-affected zone (HAZ) liquation cracking was found to be related to the heat treatment dwell time rather than the temperature. The heat treatments at 1120 and 1190 degrees C for 24h were the most susceptible to cracking. On the other hand, heat treatments at 1120, 1160 and 1190 degrees C for 4-h dwell time exhibited the least amount of cracking. The solidification cracking was found to be similar whereas the HAZ liquation cracking was lower for ATI (R) 718Plus after the heat treatment at 1120 and 1190 degrees C for 4-h dwell time in comparison to cast Alloy 718.