Effect of multi-pass deformation on hot flow behavior and microstructure evolution mechanism of Ti–6Al–4V alloy fabricated by hot isostatic pressing

Effect of Hot-Rolling Strategy on the Flow Behavior, Productivity, and Mechanical Performance of Ti-6Al-4V Alloy

“…In dynamic recrystallization, the grain boundary fracture occurs and numerous refined recrystallized β grains appear at the intersection and edges of the grain boundaries. The dynamic recrystallization phenomenon is correlated to thermal activation during thermal deformation, which considers its driving force when it attains a sufficient value because a low strain rate allows for enough deformation time for dynamic recrystallization to occur; hence, the fraction of fine recrystallized grains formed at the grain boundary increases [ 13 ]. Relatively heterogeneous distribution of the grain size ( Figure 6 b) with an average grain size of 6.53 ± 2.75 µm is observed after the IR-1 strategy.…”

“…The outstanding performance of these alloys deserves to balance the high cost of the material and processing [ 11 ]. This category’s mechanical behavior and properties depend highly on its microstructural features, such as size, morphology, and distribution of α and β phases [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 12 , 13 ]. Therefore, developing and upgrading these alloys mainly depend on the smart design of the processing regime to control the microstructure and properties [ 11 , 14 ].…”

“…Therefore, developing and upgrading these alloys mainly depend on the smart design of the processing regime to control the microstructure and properties [ 11 , 14 ]. The most well-known α + β Ti alloy is the Ti-6Al-4V alloy, which is considered an essential material in many industries, such as aircraft, automotive, defense, power plants, and biomedical prosthetics industries [ 4 , 5 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

“…[ 2 , 3 , 6 , 8 , 15 ]. These deformation circumstances and flow behavior must be tailored to attain the optimum microstructural features and mechanical properties aimed at improving the performance of the Ti-6Al-4V final products in the different service conditions [ 6 , 8 , 13 ].…”

“…Liu et al [ 13 ] studied the effect of multi-pass deformation parameters on the microstructure and flow attitude of hot isostatically pressed Ti-6Al-4V alloy. They performed one, two, and three deformation passes at 950–900–850 °C, at 0.01–1 s −1 and different strain values.…”