Microstructure and texture evolution of TA32 titanium alloy during superplastic deformation

Superplastic deformation behaviour and microstructure evolution of near-α Ti-Al-Mn alloy

“…It was concluded that the main deformation mechanism at the steady stage is grain boundary sliding accommodated by the grain rotation process. Similar effects of superplastic deformation in the near-α Ti-5.3Al-3.5Sn-3.0Zr-1.0Mo-0.4Ta-0.5Nb-0.25Si alloy were observed by Liu et al [17] and in the (α + β) type alloy observed by Xu et al [18]. Even though the superplastic deformation behaviour of some near-α titanium alloys has been recently studied, there is not much literature on the superplasticity of the Ti-2.5Al-1.8Mn near-α aerospace alloy.…”

“…Dynamic recrystallisation is usually observed in materials with partially unrecrystallised or entirely banded grain structure before the start of superplastic deformation [39,[53][54][55][56][57]. Several works [15][16][17] observed the dynamic recrystallisation effect at superplastic deformation in near-α Ti alloys and in Ti 64 at low temperature of 750 °C [39]. There were no obvious changes in either the grain aspect ratio or fractions of high angle boundaries at the steady stage of the superplastic flow of the studied alloy.…”

“…9b) and 1.6 ( Fig. 9c) dynamic recovery and recrystallisation [11,13,17,[29][30][31][32][33][34][35][36], and (iii) dynamic grain growth [37][38][39]. It is widely believed that grain boundary sliding is the main mechanism for superplasticity of Ti alloys, and grain boundary sliding is accommodated by diffusion creep and dislocation slip/creep or both [2,36,37,[40][41][42].…”

“…As aresult, near-α alloys are extensively used in jet engines. In recent times, studies on superplasticity of near-α alloys have considerably increased [9][10][11][12][13][14][15][16][17][18] due to rapidly growing applications of SPF of Ti alloys in airspace engineering. To perform SPF, one needs to understand the superplastic tensile behaviour and microstructure evolution during the deformation of near-α type alloys.…”

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

“…ε)) at elevated temperatures make titanium difficult to deform, compared with other metallic materials. Many studies have investigated the deformation behavior of Ti-based alloys to carry out the processing parameters of hot and superplastic forming [10][11][12][13][14], studying superplastic deformation mechanisms [15,16] and constructing constitutive models of superplastic deformation behavior [17][18][19][20]. ε) and deformation temperature are considered to be the main processing parameters that affect the flow behavior at elevated temperatures, i.e., (T d ).…”