Dresden 2014 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 58: Topical session: X-ray and neutron scattering in materials science III - Real-time insights into fast heat treatment processes using diffraction methods
MM 58.3: Talk
Thursday, April 3, 2014, 16:30–16:45, BAR 205
Application of in-situ high-energy X-ray diffraction and small-angle scattering for the understanding and development of advanced intermetallic multi-phase γ-TiAl based alloys — •Emanuel Schwaighofer1, Andreas Stark2, Peter Staron2, Boriana Rashkova1, Thomas Lippmann2, Norbert Schell2, Helmut Clemens1, and Svea Mayer1 — 1Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Austria — 2Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Germany
Advanced intermetallic γ-TiAl based alloys, e.g. TNM alloys with a nominal composition of Ti-43.5Al-4Nb-1Mo-0.1B-(0-1)C,Si (in at.%), are predestined for high-temperature (HT) application as turbine blades and turbocharger wheels in modern combustion engines. To improve their HT-potential, state-of-the-art methods based on high-energy monochromatic synchrotron radiation were applied combined with an adapted quenching and deformation dilatometer in order to study equilibrium and non-equilibrium phase transformations, hot-deformation behavior, texture evolution as well as carbide precipitation kinetics. Complementary real-space imaging by means of scanning and transmission electron microscopy as well as lab-scale XRD and hardness testing were performed for verification. In this talk, selected topics of the use of in-situ synchrotron scattering techniques, i.e. diffraction and small-angle scattering, conducted at HZG-operated beamlines HARWI II and HEMS at the synchrotron facility DESY, Germany, are discussed for a deeper understanding of this class of alloys.