Low Cycle Fatigue and Cyclic Deformation of TiAl Alloys

Gilbert Hénaff; Olivier Berteaux; Mustapha Jouiad; Marc Thomas

doi:10.4028/www.scientific.net/MSF.638-642.1324

Paper Titles

Hot-Workability of Gamma-Based TiAl Alloys during Severe Deformation
p.1300

Ti-Al-Cr Based Coatings for High Temperature Oxidation Protection of γ-TiAl
p.1306

The Effect of Impact on the TiAl Alloy TNBV3B Produced on Three Different Processing Routes
p.1312

Change in Microstructure by Heat-Treatment and Corresponding Deformation Behavior in Ni₃V Single Crystals
p.1318

Low Cycle Fatigue and Cyclic Deformation of TiAl Alloys
p.1324

Microstrain Analysis of Titanium Aluminides
p.1330

Tensile Ductility of Cast TiAl Alloys
p.1336

Physical and Mechanical Properties of Single Crystals of Co-Al-W Based Alloys with L1₂ Single-Phase and L1₂/fcc Two-Phase Microstructures
p.1342

Various Properties of Dual-Phase Intermetallic Compound in Ni-Al System
p.1348

HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Low Cycle Fatigue and Cyclic Deformation of TiAl...

Low Cycle Fatigue and Cyclic Deformation of TiAl Alloys

Abstract:

The relation between microstructural parameters, microscopic cyclic deformation mechanisms and macroscopic cyclic strain hardening is investigated in the case of a heat treated PM Ti-48Al-2Cr-2Nb alloy at 20°C and at 500°C. In particular it is shown that, for the different microstructures considered, a moderate hardening is related to the formation of highly tangled dislocation structures which is in turn controlled by the dislocation glide mean free path. At 500°C this structures evolves towards a braid like structure for the fine fully lamellar microstructure.