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Descripción
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| 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. | |
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Internacional
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Si |
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Nombre congreso
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The Nuclear Materials Conference: NuMat 2014 |
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Tipo de participación
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960 |
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Lugar del congreso
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Clearwater Beach, Florida |
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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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27/10/2014 |
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Fecha fin congreso
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30/10/2014 |
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Desde la página
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0 |
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Hasta la página
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0 |
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Título de las actas
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00 |