Microstructure and mechanical properties of Ni3Al and Ni3Al–1B alloys fabricated by SHS/HE

Overcoming the limitations of distinct element method for multiscale modeling of materials with multimodal internal structure

“…(37). As is seen from the figure, with the growing multigrain concentration in the volume of the material its strength and ultimate strain increase, which agrees well with the available experimental data [66][67][68]. Thus, the computer modeling results show that the increase in the strength and ultimate strain of intermetallic compound Ni 3 Al with multimodal grain structure is related both to the formation of more plastic multigrains in the material volume and, to a large degree, to an increase in grain boundary strength.…”

“…An example is intermetallic compound Ni 3 Al produced by self-propagation high-temperature synthesis and hot extrusion [66][67][68][69]. The structure of this intermetallic compound consists of micron-sized grains, a part of which are so-called ''multigrains'' (grains consisting of submicron-sized subgrains) [66][67][68][69]. An increase in the plastic strain degree of the synthesized material leads to an increase in the volume content of multigrains grain boundaries in the material.…”

“…For a real intermetallic compounds, the increasing volume fraction of multigrains in it causes an increase both in its ultimate strain and in strength [66][67][68]. Experimental data show that fracture of Ni 3 Al is mainly of grain boundary character.…”

Structure and preferred orientation of primary phases of Ni-Al-Co-based alloy alloyed by Rhenium after annealing and creep exposure

“…Alloys like (+) are generally characterized by complete orientation correspondence between -and -phases [3,[9][10][11][12]. Some similar phenomenon took place in the alloy under study, mainly in those states where the structure of cuboids was somehow damaged due to directional crystallization by means of which the specimens under study were obtained.…”

Characterization of intermetallic bonded TiC composites prepared by mechanically induced self-sustained reaction

“…Sample P5 consisted primarily of Ni and only a small amount of Ni 3 Al was formed. This implied that Ni 3 Al cannot be synthesized by MSR via ball milling of Ni and Al, although it can be easily obtained by SHS [27][28][29]. This variation may be due to the greater heat dissipation of MSR that occurs in the SHS process.…”