Berlin 2005 – scientific programme
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M: Metallphysik
M 39: Mechanische Eigenschaften II
M 39.2: Talk
Tuesday, March 8, 2005, 11:45–12:00, TU H111
Dynamic recrystallization of torsion deformed NiAl — •Burghardt Klöden1, Werner Skrotzki1, Carl-Georg Oertel1, and Erik Rybacki2 — 1Institute of Structural Physics, Division of Metal Physics, Dresden University of Technology, D-01062 Dresden, Germany — 2Geo Research Centre Potsdam, D-14473 Potsdam, Germany
Samples of the binary intermetallic compound NiAl with different initial textures were deformed in torsion in a Paterson type rock deformation machine under hydrostatic pressure of 400 MPa and at a constant maximum strain rate of 10−4s−1 at temperatures between 800K and 1300K. The maximum shear strain after up to 3 revolutions was 9 to 18. High temperature torsion as one of the modes of severe plastic deformation has been used, because due to a gradient in shear strain across the sample, the continuous development of microstructure and texture with strain can be investigated. Experimental methods included the use of the EBSD technique and high energy synchrotron radiation. The mechanisms of microstructure and texture development will be discussed with emphasis being put on dynamic recrystallization phenomena.