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Descripción
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| Self-passivating tungsten based alloys will provide a major safety advantage compared to pure tungsten when used as first wall armour of future fusion reactors, due to the formation of a protective oxide layer which prevents the formation of volatile and radioactive WO3 in case of a loss of coolant accident with simultaneous air ingress. Bulk WCr10Ti2 alloys were manufactured by two different powder metallurgical routes: 1) mechanical alloying (MA) followed by HIP of metallic capsules, and 2) MA, compaction, pressureless sintering in H2 and subsequent HIPing without encapsulation. Both routes resulted in fully dense materials with homogeneous microstructure and grain sizes of 300 nm and 1 µm, respectively. The content of impurities remained unchanged after HIP, but it increased after sintering due to binder residue. It was not possible to produce large samples by the second route due to difficulties in the uniaxial compaction stage. Flexural strength and fracture toughness measured on samples produced by the first route revealed a suctile-to-brittle-transition temperature (DBTT) of about 900°C. The strength increased from room temperature to 800°C, decreasing significantly in the plastic region. An increase of fracture toughness is observed around the DBTT. | |
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Internacional
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Si |
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Nombre congreso
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15th International Conference on PLASMA-FACING MATERIALS and COMPONENTS for FUSION APPLICATIONS |
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Tipo de participación
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970 |
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Lugar del congreso
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Aix-en-Provence, Francia |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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18/05/2015 |
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Fecha fin congreso
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22/05/2015 |
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Desde la página
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1 |
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Hasta la página
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1 |
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Título de las actas
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15th International Conference on PLASMA-FACING MATERIALS and COMPONENTS for FUSION APPLICATIONS Program |