Dynamic recrystallization during hot deformation of aluminum: A study using processing maps

Processing map for hot working of spray formed and hot isostatically pressed Al–Li alloy (UL40)

“…Flow localization at high strain rates leading to fracture is evident from the micrograph. This is in tune with the flow localization reported in pure Al and Al-Li alloys (Menon and Rack, 1994;Ravichandran and Prasad, 1991) at strain rates above 10 0 s −1 . However, in the present case, the occurrence of extended DRV domain at elevated strain rates restrict the domain-III to temperatures above 550 • C. Fig.…”

“…As such dynamic restoration processes are considered to enhance the hot workability (ductility) (Prasad and Seshacharyulu, 1998;Prasad and Sasidhara, 1997;Ravichandran and Prasad, 1991;Wadsworth et al, 1985) the deformation conditions away from the optimum results in reduced workability as seen from Fig. 9.…”

Hot deformation characterization of duplex low-density steel through 3D processing map development

“…The efficiency domains known as "safe" deformation regimes, are usually accompanied by dynamic recrystallization (DRX) [34,37,38], dynamic recovery [39] and superplastic deformation [29,40]. In the current study, the efficiency domains are determined based on the dominant microstructural mechanisms.…”

Hot working characteristics and dynamic recrystallization of delta-processed superalloy 718

“…In fact, DRX was shown to be a more efficient process to keep the flow stresses and rates of work hardening considerably low [23], which is thought to be a preferred choice for hot working. Generally, the efficiency values associated with DRX are about 30-50%, while the values related to superplasticity are very high (about 60%) [24][25][26]. Moreover, the efficiency of power dissipation by cracking processes is also generally very high since the energy conversion into surface energy is most efficient [11].…”