Hot deformation and processing maps of Inconel 690 superalloy

Hot deformation characteristics of Alloy 617B nickel-based superalloy: A study using processing map

“…13(b) and (c)). Similar phenomena have been observed in the study of other nickel-base superalloys, such as Hastelloy X [69], UDIMET 720 [70] and Inconel 690 [25]. The much more higher degree of recrystallization in the central part can be attributed to the heat generated by plastic deformation in these heavily deformed zones, which locally increase the temperature resulting in the acceleration of recrystallization process [70].…”

“…It can be concluded that the instability in the hot deformation process of Alloy 617B is mainly manifested as non-uniform flow behavior, which results in a mixture of fine dynamic recrystallized grains, elongated original grains and undeformed large original grains. Such heterogeneous microstructure induced by high strain rate has also been detected in Inconel 690 [25], Incoloy 028 alloy [71] and gʹ hardened superalloy [23]. This kind of microstructure is undesirable in the hot working process.…”

Investigation on hot workability characteristics of Inconel 625 superalloy using processing maps

“…The bands are oriented at about 45°with respect to the principal stress axis [13,14]. The same phenomenon was observed in compression tests of the other nickel-based alloys such as Hastelloy X superalloy [6], Inconel 718 [13], and Inconel 690 [16]. In addition, the microstructure obtained at 950°C and 1 s -1 in Fig.…”

“…Processing maps have been used for the characterization and optimization of hot workability in many Ni-based superalloys such as Inconel 718, Inconel MA 754, Inconel 690, nimonic 75, nimonic 80A, nimonic 90, Haynes 230 [13][14][15][16][17][18]. Processing maps of the Inconel 625 produced by powder metallurgy routes were successively developed by Medeiros and workers.…”

Structure, Microsegregation, and Precipitates of an Alloy 690 ESR Ingot in Industrial Scale

“…[4] It has also been reported that titanium nitrides are the preferential sites for pit initiation, [10,11] and Dutta et al attributed this to the large degree of misfit between nitrides and the austenitic matrix. [12] Besides, the corrosion behavior, [13][14][15][16][17][18] mechanical properties, [5,10,[19][20][21][22][23][24] and workability [25,26] of deformed Alloy 690 have also been investigated.…”