Author:
Seetharaman V.,Malas J. C.,Lomibard C. M.
Abstract
ABSTRACTForward extrusion of a gamma-TiAl alloy (Ti-49.5A1-2.5Nb-l.lMn) was investigated, with special reference to the role of preheat temperature, ram velocity, and can material. Cylindrical billets were sealed in evacuated cans, soaked at extrusion temperatures ranging from 1050 to 1350°C for 2 hr and then extruded through streamlined dies held at 260°C. Microstructural features of the extruded billets which evolved under steady-state conditions were characterized. In conjunction with these observations, a coupled (thermal-deformation) finite-element analysis procedure was used to predict the local distributions of strain, strain rate, temperature, and stress present during extrusion. The microstructures of the extruded products are compared with those obtained in samples subjected to isothermal constant-strain-rate compression tests.
Publisher
Springer Science and Business Media LLC
Reference6 articles.
1. 3. Lipsitt H. A. , in High Temperature Ordered Intermetallics. edited by Koch C.C. , . (Mater. Res. Soc. Proc. 39, Pittsburgh, PA, 1985), pp. 351–364.
2. On fracture initiation mechanisms and dynamic recrystallization during hot deformation of pure nickel
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