Self-passivating W-Cr-Y alloys: Characterization and testing
| Autor: | E. Tejado, A. Calvo, Iñigo Iturriza, Freimut Koch, Jose Ygnacio Pastor, Carmen García-Rosales, Karsten Schlueter, N. Ordás, Gerald Pintsuk |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Alloy Oxide chemistry.chemical_element 02 engineering and technology Thermal treatment engineering.material Tungsten 7. Clean energy 01 natural sciences 010305 fluids & plasmas chemistry.chemical_compound Fracture toughness Materials Science(all) Flexural strength 0103 physical sciences General Materials Science Composite material Civil and Structural Engineering Materiales 020502 materials Mechanical Engineering Grain size 0205 materials engineering Nuclear Energy and Engineering chemistry engineering Grain boundary ddc:620 |
| Zdroj: | Fusion engineering and design 124, 1118-1121 (2017). doi:10.1016/j.fusengdes.2017.03.001 Fusion Engineering and Design Proceedings of 29th Symposium on Fusion Technology (SOFT 2016) | 29th Symposium on Fusion Technology (SOFT 2016) | 05/09/2016-09/09/2016 | Praga, República Checa Archivo Digital UPM instname |
| DOI: | 10.1016/j.fusengdes.2017.03.001 |
| Popis: | The use of self-passivating tungsten alloys for the first wall armor of future fusion reactors is advantageous concerning safety issues in comparison with pure tungsten. Bulk W-10Cr-0.5Y alloy manufactured by mechanical alloying followed by HIP resulted in a fully dense material with grain size around 100 nm and a dispersion of Y-rich oxide nanoparticles located at the grain boundaries. An improvement in flexural strength and fracture toughness was observed with respect to previous works. Oxidation tests under isothermal and accident-like conditions revealed a very promising oxidation behavior for the W-10Cr-0.5Y alloy. Thermo-shock tests at JUDITH-1 to simulate ELM-like loads resulted in a crack network at the surface with roughness values lower than those of a pure W reference material. An additional thermal treatment at 1550 °C improves slightly the oxidation and thermo-shock resistance of the alloy. |
| Databáze: | OpenAIRE |
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