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MM: Metall- und Materialphysik

MM 7: Symposium Severe Plastic Deformation II

MM 7.3: Talk

Monday, March 27, 2006, 15:30–15:45, IFW A

Tracing microstructure and mechanical properties evolution in ECAP: experiment vs. simulation — •Ralph J. Hellmig and Yuri Estrin — Institut für Werkstoffkunde und Werkstofftechnik, Technische Universität Clausthal, Agricolastr. 6, 38678 Clausthal–Zellerfeld

Equal channel angular pressing (ECAP) is a well–known method to produce ultra–fine grained bulk materials. In this process, a specimen is pressed through an angular channel leading to structural refinement, which results in a beneficial change of mechanical properties. Using dislocation density related constitutive modelling it is possible to trace the microstructure evolution as well as the variation of the mechanical properties during ECAP deformation. A comparison of experimental results and simulations for various materials will be given to demonstrate the capabilities of the model itself and the simulation technique applied.