Microstructure Evolution and Tensile Properties of a Selectively Laser Melted CoNi-Base Superalloy

Multi-length-scale study on the heat treatment response to supersaturated nickel-based superalloys: Precipitation reactions and incipient recrystallisation

“…The onset of static recrystallisation occurs within minutes, whereas it takes hours for the material to achieve full recrystallisation. The resultant microstructure with reduced anisotropy and larger grain sizes, nevertheless, faces a universal ductility challenge as evidenced in multiple superalloy systems [13,72,73,74,75]. Future work to understand the root cause of the embrittlement and strategies for mitigation is needed.…”

Interplay between solidification microsegregation and complex precipitation in a γ/γ’ cobalt-based superalloy elaborated by directed energy deposition

“…For example, Després et al finely characterized the secondary precipitation occurring in nickel-based superalloys processed by laser powder bed fusion (L-PBF) [26] where the cooling rate is very high [1]. On the other hand, only a few studies have been focused on additively manufactured γ/γ' cobalt-based superalloys [27][28][29][30]. To our knowledge, no fabrication by DED has been reported yet.…”