Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Microstructural and mechanical characterization of annealed tungsten (W) and potassium-doped tungsten foils
Year:2015
Research Areas
  • Engineering
Information
Abstract
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 knownfromthebulb industryand showanenhanced creep and recrystallizationbehaviour that canbe explained by the formationofpotassium-filledbubbles that are surroundingthe elongated grains, leadingto aninterlocking 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 paperwe showthe results of three-point bending tests performed at roomtemperature 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 showthat there is a positive effect of potassium-doped tungsten foils compared to pure tungsten foil and demonstrate the potential of the doped foil.
International
Si
JCR
Si
Title
International Journal of Refractory Metals & Hard Materials
ISBN
0263-4368
Impact factor JCR
1,764
Impact info
Datos JCR del año 2013
Volume
48
10.1016/j.ijrmhm.2014.09.005
Journal number
From page
145
To page
149
Month
ENERO
Ranking
Participants
  • Autor: Teresa Palacios Garcia (UPM)
  • Autor: Jens Reiser (Karlsruhe Institute of Technology, Germany)
  • Autor: Jan Hoffmann (Karlsruhe Institute of Technology, Germany)
  • Autor: Michael Rieth (Karlsruhe Institute of Technology, Germany)
  • Autor: Andreas Hoffmann (Plansee SE, Reutte, Austria)
  • Autor: Jose Ignacio Pastor Caño (UPM)
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)