Interactive effects of cyclic oxidation and structural evolution for Ti-6Al-4V/(TiC+TiB) alloy composites at elevated temperatures

Multiscale Architecture and Superior High‐Temperature Performance of Discontinuously Reinforced Titanium Matrix Composites

“…By adjusting the microstructural parameters (network size, reinforcement content), various combinations of tensile strength and elongation could be obtained. [ 14 ] Subsequently, TiC (Figure 10a2) and hybrid (TiB+TiC) (Figure 10a3) reinforced DRTMCs with the network microstructure were also in situ synthesized [ 15a ] (Figure 10a2‐1), which contributed to the enhanced oxidation resistance. [ 15 ] Furthermore, network architecture certainly benefits the high‐temperature mechanical properties by prohibiting grain boundary softening.…”

“…[ 14 ] Subsequently, TiC (Figure 10a2) and hybrid (TiB+TiC) (Figure 10a3) reinforced DRTMCs with the network microstructure were also in situ synthesized [ 15a ] (Figure 10a2‐1), which contributed to the enhanced oxidation resistance. [ 15 ] Furthermore, network architecture certainly benefits the high‐temperature mechanical properties by prohibiting grain boundary softening. For instance, the service temperature of TA15 and Ti60 alloys matrix composites with a network microstructure can be increased to 600–800 °C, which can meet the urgent need of aerospace applications.…”

“…a2‐1) Reproduced with permission. [ 15b ] Copyright 2012, Elsevier. b1,b1‐1,b1‐2) Reproduced with permission.…”

“…[ 1a,6a ] TiC/Ti64 and (TiB+TiC)/Ti64 composites with network microstructure have also been proved to endure superior high‐temperature oxidation resistance by effectively pining and segmenting the oxide scale. [ 15 ] Additionally, increasing effort has been devoted to tailoring reinforcement distribution in other MMCs. [ 1b,2a,16 ]…”

Sub-stoichiometry-facilitated oxidation kinetics in a δ-TixC-doped Ti-based alloy

“…Ti x C particles with diameters of~5 μm and a volume fraction of~3.4% were doped into a high-purity Ti-6Al-4V alloy matrix (supporting information) via an in situ synthesis technique, of which the mechanisms have been demonstrated elsewhere. 38 To obtain a thermodynamically stable initial state, the bulk Ti-6Al-4V/Ti x C specimens were subjected to high-vacuum (<10 −4 Pa) furnace cool after being fabricated at 1473 K. Phase constitutions of the as-sintered alloys were analyzed using a Panalytical Empyrean XRD (scanning step 0.02 o , four separate specimens were measured). An FEI Talos 200 TEM was employed to accomplish the crystallographic characterizations.…”