Effects of the amount of γ′ and oxide content on the secondary recrystallization temperature of nickel-base superalloys

Dynamic recrystallization phenomena during laser-assisted friction stir processing of a precipitation hardened nickel base superalloy

“…The grain boundaries dragging induced by the pinning effect of two fine carbides is evident in this figure. (B) Role of re-precipitated γ΄particles: It has been found that grain boundary migration during recrystallization and grain growth was strongly inhibited by the pinning effect of the γ΄ particles [23][24][25][26]. Song and Aindow [24] and Kusunoki et al [25] reported that the grain size of the recrystallized materials decreases when the volume fraction of undissolved γ΄ particles at the static recrystallization temperature increases. Dahlen and Winberg [26] suggested that M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 5 new γ grains can be nucleated at the triple points between the grains and γ΄ particles.…”

Recrystallization of Dispersion-Strengthened Copper Alloys

“…Early researchers (Singer & Gessinger, 1982;Mino et al, 1987;Kusunoki et al, 1990) reported that the very large recrystallized grains found in dispersion-strengthened alloys are formed through secondary recrystallization. They concluded that primary recrystallization occurred immediately before secondary recrystallization, or during plastic deformation -dynamic recrystallization.…”

Effect of duplex grain size distributions on long term stress-rupture life at 600 °C/450 MPa of Nimonic 80A

“…Patra et al [7] found that low carbon steel samples with bimodal grain size distribution showed lower strength but better tensile ductility than that of ultra-fined grained steel. In order to develop high temperature strength, the fine grains must be transformed into large grains by recrystallization for oxide dispersion strengthened alloy MA 6000 [8,9]. Microstructure evolution during recrystallization of superalloy 718 shows that the recrystallized grain size as well as the fraction of new grains increases with the increasing deformation temperature [10].…”