Plastic flow behavior of Ti48Al2.5Nb0.3Ta at hot-working temperatures

High-Temperature Deformation Behavior of the γ Alloy Ti-48Ai-2Cr-2Nb

“…This softening is thought to be primarily caused by dynamic recovery and recrystallization, and/or occurrence of cracking; obervations of these phenomena are described later. However, other measurements [6] suggested the main reason for the flow softening was deformation heating. Moreover, flow stress generally increases with increasing strain rate at constant temperature and strain.…”

“…As a result, the alloy Ti-48A1-2Cr-2Nb has emerged as a baseline alloy for which a large amount of microstructure-property behavior has been obtained [2,3]. However, forging is considered an essential processing step for wrought product manufacture and relatively limited effort [4][5][6] has been focused on elevated temperature workability. Therefore, this study was undertaken to better understand the high-temperature deformation behavior and to help determine the forging parameters for Ti-48A1-2Cr-2Nb.…”

The Technology of Titanium Aluminides for Aerospace Applications

“…(48) or deformation heal.ing at higher temperatures or strain rates (0.1 to 10 set-') (49). The former strain rate range is typical of forging operations and leads to true stress-strain cuwes of the form shown in Fig.7 (48).…”

Workability and microstructure evolution of Ti–47Al–2Cr–1Nb alloy during isothermal deformation

“…Although hot working by isothermal forging and extrusion has been widely used by many investigators to study the microstructural development and hot working behavior of g-TiAl alloys [6,8,[9][10][11][12][13][14][15][16][17][18], there are only a limited number of studies dealing with microstructure evolution and workability from TiAl ingot metallurgy processing to final component during isothermal forging. These reports on hot workability have focused on ingot metallurgy (I/M) processing and typically have emphasized on material starting condition [19][20][21][22][23][24].…”