Fabrication and mechanical properties of TiC reinforced CoCrFeMnNi high-entropy alloy composite by water atomization and spark plasma sintering

Microstructures and Tribological Properties of TiC Reinforced FeCoNiCuAl High-Entropy Alloy at Normal and Elevated Temperature

“…Table 1 presents the mixed enthalpy between carbon and several metal elements. Considering the lowest value of mixed enthalpy between Ti and C, the formation of TiC is reasonable and consistent with that reported by Yim [17]. According to the XRD data, the equilibrium lattic e constants of the FCC and BCC phases in the HEA were calculated as 3.521 and 2.881 Å, respectively, while the lattice constants of FCC and BCC phases in the composites were 3.53 and 2.884 Å, respectively.…”

“…In addition to the alloy matrix, there are two types of impurities, i.e., white particles attached on the surface (Figure 2a) and black spots dispersed in the matrix (Figure 2b). The white particles are presumed to be silica powders in oxide polishing solution (OPS) owing to their similar size (0.04 µm), while the black spots correspond to oxides [17,36]. The impurities are generally introduced by the milling medium and/or the process controlling agent (PCA) during the MA process [37,38].…”

“…TiC is considered a good candidate as the strengthening phase due to its high melting point, high hardness, low density, good metal matrix wettability, good chemical stability, and excellent wear resistance [16]. The optimized yield strength of the (FeCrNiCo)Al 0.75 Cu 0.25 HEA reinforced by TiC particles can reach 1637 MPa, which is increased by 90.6% compared to the (FeCrNiCo)Al 0.75 Cu 0.25 HEA [17]. However, the precipitation of ceramic nanoparticles in the metal matrix tends to be unevenly distributed, which is probably originated from the instability of the interfaces between the ceramic particles and the metal matrix [18][19][20].…”

Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting

“…In most cases, the high dislocation density has a key effect on the high strength level in SLM-processed materials [11,22]. For the dislocation hardening effect, the following Taylor equation can be applied [25]:…”

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

“…Guo et al [32] prepared the TiN-reinforced CoCr 2 FeNiTi 0.5 high-entropy alloy composite, the results demonstrated that hardness and corrosion resistance of coating improve tremendously. Yim et al investigated the microstructural evolution and mechanical properties of TiC-reinforced CoCrFeMnNi highentropy alloy composite [33], the results show that the 5 wt% of TiC addition resulted in fine grain size; the yield strength, strain hardening of composite increased due to grain boundary strengthening, dislocation strengthening, and dispersion strengthening. The Y 2 O 3 -reinforced Al 0.3 CoCrFeMnNi high-entropy alloy composite was processed by Gwalani et al [34], the paper find that the insitu formation of complex oxide Al-Y 2 O 3 enhancing the strength, the compressive yield strength of composite increased from 0.98 GPa (0 vol% Y 2 O 3 ) to 1.76 GPa (3 vol% Y 2 O 3 ).…”