München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.96: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Investigation of the synergistic effects of H and radiation damage on the mechanical properties of W — •Bailey Curzadd1,2, Johann Riesch1, Till Höschen1, Alexander Feichtmayer1,2, and Rudolf Neu1,21Max-Planck-Institut für Plasmaphysik, Garching, Deutschland — 2Technische Universität München, München, Deutschland

As a common plasma-facing material in fusion reactors, tungsten (W) is exposed to high-energy neutron and hydrogen (H) fluxes. Progress in the development of a new experimental device to investigate the impact of this environment on the mechanical properties of W will be presented. The device will be used to characterize the influence of radiation damage, implanted H (as well as other impurities), and their synergistic interactions on the strength and ductility of W. Radiation damage will be produced by self-damaging with W ions at 20 MeV. Impurity atoms will be subsequently implanted in the sample, and the mechanical properties determined via in situ tensile testing. Due to the low penetration depth of W ions, thin fibers and foils (≤ 5 µm) are foreseen as samples. Additionally, the high degree of deformation in these material forms results in fine microstructures, which reduces the influence of grain-size effects and thus enables the simulation of bulk material behavior. The influence of temperature during irradiation and mechanical loading will also be examined.

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