Recrystallization in as-cast polycrystalline intermetallic compound Ni3Al

Influence of Subsurface Micro/Nano-Structural Evolution on Macroscopic Tribological Behavior of Ni3Al Matrix Composites

“…The process of dDRX is accomplished through nucleation and growth of the recrystallized grain to eliminate the defects caused by deformation, such as dislocation and sub-grain boundary, which is characterized by the migration of large-angle grain boundary [29]. The severe plastic deformation and higher temperature are necessary to the appearance of dDRX [30,31]. Therefore, we now discuss the temperature of the surface of NMCs caused by the accumulation of friction heat.…”

“…Therefore, it can be concluded that the local surface temperature is too low to cause discontinuous dynamic recrystallization. However, after years of research, it has been found that the ultrafine grained structures can be developed during the process of cDRX at severe plastic deformation but low temperature [30,38]. During this process, sub-grains absorb the dislocations and help to transform a substantial part of the small-angle grain boundaries into largeangle grain boundaries by absorbing dislocations, thereby leading to grain refinement.…”

Dynamic deformations tests of Ni3Al based intermetallic alloy by using the split Hopkinson pressure bar technique

“…Although, there is a great number of papers on static or quasi-static tensile and compression behavior of Ni 3 Al-based alloys [8][9][10][11][12], a very limited information is reported on mechanical response of nickel aluminides deformed under dynamic conditions. To our best knowledge, the only available papers on this matter are authored by Grey et al [13,14] which present the results of Ni 3 Al alloys fabricated by a powder metallurgy approach, and subjected to compression tests at strain rates up to 10 3 s -1 and under the true strain limited to 0.2.…”