Shear Texture Formation during High-Strain Torsion of Titanium Aluminides

G.H. Cao; Burghardt Klöden; C.G. Oertel; Werner Skrotzki; U. Garbe; E. Rybacki; Heinz Günter Brokmeier

doi:10.4028/www.scientific.net/SSP.105.303

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Shear Texture Formation during High-Strain Torsion of Titanium Aluminides

Abstract:

Ti-47Al-4(Cr, Nb, Mn, B) samples with different initial grain structures and fibre textures were deformed in torsion at 1000 °C under hydrostatic pressure of 400 MPa in a Paterson type rock deformation machine at a maximum constant strain rate of 2*10-4 s-1. The microstructure was investigated by transmission electron microscopy (TEM). Local texture measurements as a function of shear strain were done with high-energy synchrotron radiation. During shearing due to dynamic recrystallization the initially lamellar structure breaks down into a fine-grained globular structure with a g grain size in the order of 5 µm. The shear texture developed consists of <110> and {110} inclined to the shear direction and shear plane, respectively. The microstructure and texture development is discussed.

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Periodical:

Solid State Phenomena (Volume 105)

Pages:

303-308

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.105.303

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Online since:

July 2005

Authors:

G.H. Cao, Burghardt Klöden, C.G. Oertel, Werner Skrotzki, U. Garbe, E. Rybacki, Heinz Günter Brokmeier

Keywords:

Microstructure, Synchrotron Radiation (XRD), TEM, Texture, TiAl, Torsion

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