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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 58.1: Topical Talk
Donnerstag, 3. April 2014, 15:45–16:15, BAR 205
Real-time insights into fast heat treatment processes using diffraction methods — •Jens Gibmeier1, Vladimir Kostov1, Fabian Wilde2, Peter Staron2, Arne Kromm3, Thomas Kannengiesser3, and Alexander Wanner1 — 1KIT, Inst. of Applied Materials, Karlsruhe, Germany — 2Helmholtz-Center Geesthacht, Inst. of Mat. Res., c/o DESY, Hamburg, Germany — 3BAM Federal Inst. for Mat. Res. and Testing, Berlin, Germany
Laser surface hardening and related processes are viable techniques for surface integrity optimization of technical components. Although, the techniques are standard processes in industrial applications, process optimization is essentially based on simulation and on characterization after material processing. Moreover, the simulations often lack in an adequate accuracy, since the models are still deficient. Knowledge about the phase transformation kinetics and about the evolution of local (residual) stress distributions is of essential importance for the optimization of the surface hardening process and hence, for the tailoring of the treated surface layers. A considerable progress can be achieved when a real-time insight into these local short-time heat treatment processes can be gained. By this means process comprehension can be achieved as well as a proper validation of the simulation models can be offered. Here, different set-ups for real-time monitoring of phase transformation as well as stress evolution during fast heat treatment processes by means of synchrotron X-ray diffraction will be presented. Successful application for laser surface hardening and arc welding will be shown.