About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
Enhanced Mechanical Properties of Interface-strengthened UFG Tungsten and Tungsten-based Nanocomposites |
Author(s) |
Michael Wurmshuber, Simon Doppermann, Markus Alfreider, Michael Burtscher, Daniel Kiener |
On-Site Speaker (Planned) |
Michael Wurmshuber |
Abstract Scope |
Ultra-fine grained and nanocrystalline materials are making a strong case for deployment in high-performance applications, due to the interesting material properties arising from the large amount of interfaces within the material. However, these interfaces also play an important role in fracture processes in such materials, as they can provide a relative easy path for crack propagation. In order to improve the fracture performance of ultra-fine grained and nanostructured materials, doping with interface-cohesion enhancing elements is performed in this work. Ultra-fine grained tungsten was chosen as a model material, due to its inherent brittleness and its exciting possible application in nuclear fusion facilities. After this proof of concept, nanocrystalline W-Cu composites, combining the advantages of a hard and a soft phase, were fabricated with and without doped interfaces. A series of micromechanical in-situ experiments was performed to investigate the effect of the interface doping on strength, ductility and fracture toughness. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Nuclear Materials |