Microstructural and mechanical characterization of annealed tungsten (W) and potassium-doped tungsten foils

Palacios García, Teresa; Reiser, J.; Hoffmann, J.; Rieth, M.; Hoffmann, A. y Pastor Caño, Jose Ignacio (2015). Microstructural and mechanical characterization of annealed tungsten (W) and potassium-doped tungsten foils. "International Journal of Refractory Metals and Hard Materials", v. 48 ; pp. 145-149. ISSN 0263-4368. https://doi.org/10.1016/j.ijrmhm.2014.09.005.

Descripción

Título: Microstructural and mechanical characterization of annealed tungsten (W) and potassium-doped tungsten foils
Autor/es:
  • Palacios García, Teresa
  • Reiser, J.
  • Hoffmann, J.
  • Rieth, M.
  • Hoffmann, A.
  • Pastor Caño, Jose Ignacio
Tipo de Documento: Artículo
Título de Revista/Publicación: International Journal of Refractory Metals and Hard Materials
Fecha: Enero 2015
Volumen: 48
Materias:
Palabras Clave Informales: Potassium-doped tungsten foil; grain growth
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (1MB) | Vista Previa

Resumen

Here we show that potassium-doped tungsten foil should be preferred to pure tungsten foil when considering tungsten laminate pipes for structural divertor applications. Potassium-doped tungsten materials are well known from the bulb industry and show an enhanced creep and recrystallization behaviour that can be explained by the formation of potassium-filled bubbles that are surrounding the elongated grains, leading to an interlocking of the microstructure. In this way, the ultra-fine grained (UFG) microstructure of tungsten foil can be stabilized and with it the extraordinary mechanical properties of the foil in terms of ductility, toughness, brittle-to-ductile transition, and radiation resistance. In this paper we show the results of three-point bending tests performed at room temperature on annealed pure tungsten and potassium-doped tungsten foils (800, 900, 1000, 1100, 1200, 1300, 1400, 1600, 1800, 2000, 2200, and 2400 °C for 1 h in vacuum). The microstructural assessment covers the measurement of the hardness and analyses of fractured surfaces as well as a comparison of the microstructure by optical microscopy. The results show that there is a positive effect of potassium-doped tungsten foils compared to pure tungsten foil and demonstrate the potential of the doped foil

Más información

ID de Registro: 35447
Identificador DC: http://oa.upm.es/35447/
Identificador OAI: oai:oa.upm.es:35447
Identificador DOI: 10.1016/j.ijrmhm.2014.09.005
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0263436814002200
Depositado por: Memoria Investigacion
Depositado el: 28 May 2015 15:21
Ultima Modificación: 28 May 2015 15:21
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM