Memorias de investigación
Artículos en revistas:
Manufacturing of self-passivating tungsten based alloys by different powder metallurgical routes
Año:2016
Áreas de investigación
  • Ingenierías
Datos
Descripción
Self-passivating tungsten based alloys will provide a major safety advantage compared to pure tungsten when used as first wall armor 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 hot isostatic pressing (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 ?m, 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 route (2) due to difficulties in the uniaxial compaction stage. Flexural strength and fracture toughness measured on samples produced by route (1) revealed a ductile-to-brittle-transition temperature (DBTT) of about 950 °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.
Internacional
Si
JCR del ISI
No
Título de la revista
Physica Scripta
ISSN
0031-8949
Factor de impacto JCR
1,194
Información de impacto
2015 Impact Factor
Volumen
2016
DOI
10.1088/0031-8949/T167/1/014041
Número de revista
T167
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1
Hasta la página
6
Mes
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Participantes
  • Autor: A. Calvo CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain
  • Autor: N. Ordás CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain
  • Autor: I. Iturriza CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain
  • Autor: Jose Ygnacio Pastor Caño UPM
  • Autor: Elena Maria Tejado Garrido UPM
  • Autor: Teresa Palacios Garcia UPM
  • Autor: C. García-Rosales CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Ciencia de Materiales