3.1. Hardness measurements
The IFW process provided a joined sample with dissolved γ′
precipitates within the LSHR material (Fig. 1). The dissolved region
extended approximately 100 mm into the LSHR material. Large γ′
precipitates within the Mar-M247 are still present up to the in-
terface location.
Because we were interested in the evolution of γ′ within LSHR
material under IFW conditions, we used the more heat resistant