Designing high entropy alloy-ceramic eutectic composites of MoNbRe0.5TaW(TiC)x with high compressive strength

The Grain Boundary Wetting Phenomena in the Ti-Containing High-Entropy Alloys: A Review

“…In the majority of cases, multicomponent alloys are synthesized by crystallization from the melt (arc or induction melting in vacuum or argon [5][6][7][13][14][15][16][17][18][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43], plasma spark sintering [19], electric current assisted sintering [20,21], laser or plasma cladding deposition of coatings [44][45][46][47][48][49][50][51][52][53][54][55], additive manufacturing by the laser-powder bed fusion [56,57] or laser-metal deposition [58], self-propagating high-temperature synthesis (SHS) [59], and by brazing within the brazing joints [60,61]). Figure 1 shows a schematic phase diagram for the simplest case when there are on...…”

“…They remain in the solidified sample in the form of a continuous network surrounding the grains poor in the second component (see, for example, the microstructure in Figure 4). discuss the crystallization from the melt during arc or induction melting in vacuum or argon [5][6][7][13][14][15][16][17][18][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. If the two-phase S + L area of the phase diagram does not contain any tie lines, Twmax or Twmin, of the GB wetting transition, then the one-phase solid solution polycrystal with typical dendritic structure forms after solidification of the melt.…”

Design and characterization of eutectic refractory high entropy alloys

“…Due to the similarity of slopes at 22 and 600 °C, the Laves phase's strengthening ability seems insensitive to temperature growth in this interval. At temperatures ≤ 600 °C, the yield strength increased by [30][31][32][33][34][35] MPa with an addition of every 1 vol.% of the Laves phase. This observation means that the alloys' strength reduction observed between 22 and 600 °C can be attributed to the softening of the bcc/B2 phase ( Fig.…”

“…Recently, Wei et al [32] explored the possibility of eutectic composites obtaining in a MoNbRe 0.5 TaW(TiC) x RHEA system. It was found that a MoNbRe 0.5 TaW(TiC) 1.0 alloy with a eutectic structure consisted of a bcc solid solution and an fcc multicomponent carbide had high compressive yield strength (1496 ± 17 MPa) and peak strength (1943 ± 13 MPa) with reasonable plasticity at ambient temperature.…”

Grain Boundary Wetting Phenomena in High Entropy Alloys Containing Nitrides, Carbides, Borides, Silicides, and Hydrogen: A Review

“…Usually, HEAs synthesis is based on the crystallization from the melt by induction or arc melting [5][6][7][8][9][10][11][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], plasma spark [36] or electric current assisted sintering [37,38], additive manufacturing by laser metal deposition [39], laser powder bed fusion [40,41] or laser or plasma cladding deposition of coatings [42][43][44][45][46][47][48][49][50][51][52][53], self-propagating high-temperature synthesis (SHS) [54], or brazing of dissimilar materials [55,56]. However, several HEA manufacturing technologies are based exclusively on the processes occurring in the solid state, such as solid-phase sintering [57]...…”