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Memorias de investigación
Communications at congresses:
Mechanical Characterization of Tungsten Alloys with Vanadium and Yttria Additions as Function of Temperature and Atmosphere
Year:2014
Research Areas
  • Engineering
Information
Abstract
The aim of this paper is to evaluate the effect on the mechanical properties of adding Vanadium (2 or 4 wt%) and 0.5 wt% Yttria in a pure tungsten (W) reference material all processed via hot isostatic pressing (HIP). To determine the mechanical strength, yield strength and fracture toughness we performed three-point bending (TPB) tests on notch and smooth samples in both oxidising atmosphere and vacuum. The temperature range studied is from 77 K, obtained via immersion in liquid nitrogen, to 1473 K. Moreover, we measured the Vickers microhardness and elastic modulus via impulse excitation technique (IET) and compare the results with the nanoindentation tests to determine the effect of size. Finally, with a field emission scanning electron microscopy (FE-SEM) equipped with X-ray energy-dispersive spectrometer (EDX) and electron backscatter diffraction detector (EBSD), we analysed the microstructure, fracture surface and transversal sections of the tested alloys at different temperatures. This way we can establish the link between the macroscopic behaviour and the micromechanism of failure. Additionally, to contribute to determine the initiation of the crack during fracture, we have also calculated the critical size defect from the values of the TPB tests to check the defects on the fracture surfaces and determine the initiation of the crack.
International
Si
Congress
The Nuclear Materials Conference: NuMat 2014
960
Place
Clearwater Beach, Florida
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
27/10/2014
End Date
30/10/2014
From page
0
To page
0
00
Participants
  • Autor: Teresa Palacios Garcia (UPM)
  • Autor: Antonia Martin Sanz (UPM)
  • Autor: M.A, Monge (UC3M)
  • Autor: Jose Ignacio Pastor Caño (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Departamento: Ciencia de Materiales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
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