Berlin 2018 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 3: Topical session (Symposium MM): Hydrogen in Materials
MM 3.5: Vortrag
Montag, 12. März 2018, 12:15–12:30, H 0107
Hydrogen embrittlement of Tungsten induced by Deuterium Plasma: Insights from Nanoindentation Test — •Xufei Fang1, Arkadi Kreter2, Marcin Rasinski2, Christoph Kirchlechner1, Steffen Brinckmann1, Christian Linsmeier2, and Gerhard Dehm1 — 1Max-Planck-Institut für Eisenforschung GmbH, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Str. 1, 40237 Düsseldorf, Germany — 2Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
Hydrogen exposure has been found to result in metal embrittlement. We use nanoindentation experiments to study the mechanical properties of single crystalline and polycrystalline tungsten subjected to deuterium plasma. The results exhibit a decrease in the pop-in load and increase in hardness on exposed tungsten sample due to the presence of deuterium. These findings agree with the defactant theory that explains the decrease of the load required for dislocation nucleation. The hardness increase is also discussed based on the solid solution strengthening effect.