1. It is found that different post-processing routes have little impact on both the FCC-? matrix grains and the precipitated ?' particles. The grain sizes of the FCC-? matrix in S1-SA and S2-SRA samples are comparable, being ~14 ?m. Also, the trimodal distributions of ?' particles are quite similar, being the coarse primary ?' particles on GBs and interior grains, fine ellipsoidal secondary and spherical tertiary ?' nanoparticles within the matrix grains. The particle size and volume fraction of these three kinds of particles in these two states are r p ~ 400 nm and f ?'-p ~ 11 % (primary ?'), r s ~ 23 nm and f ?'-s ~ 29 % (secondary ?'), r t ~ 5 nm and f ?'-t ~ 1 % (tertiary ?'), respectively. However, the cold-rolling after solid-solution produces a large amount of dislocations, SFs, L-C locks, and deformation twins, which are not eliminated by subsequent double-aging. Resultantly, the yield strength (1855 MPa at RT and 1086 MPa at 1023 K) in S2-SRA is much higher than that (1126 MPa at RT and 912 MPa at 1023 K) in S1-SA. The strengthening mechanisms were further discussed;Zr (wt.%)
2. The Superalloys
3. Superalloys
4. Superalloys