Processing maps of Ti662 unreinforced and reinforced with TiC particles according to dynamic models

Characterization of the hot deformation behavior of a Ti–22Al–25Nb alloy using processing maps based on the Murty criterion

“…Based on the analysis above, the optimum processing parameters of Tie22Ale25Nb alloy are determined at lower temperatures (940e970 C) and lower strain rates (<0.01 s À1 ). The processing map also exhibits a large domain of flow instability [13,17,29] at strain rates higher than 1.0 s À1 , which is probably caused by the occurrence of adiabatic shear bands or localized plastic flow. Fig.…”

“…In previous reports, a similar domain at higher temperatures and lower strain rates has also been recorded by Semiatin [18] on the Tie6Ale4 V alloy with lamellar starting structure. It is widely recognized that high peak power dissipation efficiency is often associated with dynamic recrystallization [29] or superplasticity [15,30]. In order to validate whether superplasticity occurs in this domain, high temperature tensile testing has been carried out.…”

Mechanical properties of particle reinforced titanium and titanium alloys

“…+1 to 3 % per vol.% SiC. 4. The grain refinement produced by the TiB needles results in an increment of the strength due to Hall Petch mechanisms.…”

“…The reaction between SiC and Ti produces brittle silicides [17], decreasing the performance of the composite. This was avoided by short exposure times at high temperatures during its production [4]. TiB 2 is converted into TiB as long as the average B concentration in the reaction zone is less than 18-18.5 wt.% [18].…”

“…Regarding metal matrix composites (MMC), particulate reinforced alloys (PRM) are cheaper than the continuous fibre reinforced alloys, and can be forged, cut, formed, and their properties are more or less isotropic. Deformation maps show the limits of hot working of composites compared to their matrices [4].…”