The effects of tantalum addition on the microtexture and mechanical behaviour of tungsten for ITER applications

Tejado Garrido, Elena María and Carvalho, P.A. and Muñoz, A. and Dias, M. and Correia, J.B. and Mardolcar, U.V. and Pastor Caño, Jose Ignacio (2015). The effects of tantalum addition on the microtexture and mechanical behaviour of tungsten for ITER applications. "Journal of Nuclear Materials", v. 467 ; pp. 949-955. ISSN 0022-3115. https://doi.org/10.1016/j.jnucmat.2015.10.034.

Description

Title: The effects of tantalum addition on the microtexture and mechanical behaviour of tungsten for ITER applications
Author/s:
  • Tejado Garrido, Elena María
  • Carvalho, P.A.
  • Muñoz, A.
  • Dias, M.
  • Correia, J.B.
  • Mardolcar, U.V.
  • Pastor Caño, Jose Ignacio
Item Type: Article
Título de Revista/Publicación: Journal of Nuclear Materials
Date: December 2015
ISSN: 0022-3115
Volume: 467
Subjects:
Freetext Keywords: Tungsten; Tantalum; Fracture toughness; Mechanical properties; High temperature; Nuclear applications
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Tungsten (W) and its alloys are very promising materials for producing plasma-facing components (PFCs) in the fusion power reactors of the near future, even as a structural part in them. However, whereas the properties of pure tungsten are suitable for a PFC, its structural applications are still limited due to its low toughness, ductile to brittle transition temperature and recrystallization behaviour. Therefore, many efforts have been made to improve its performance by alloying tungsten with other elements. Hence, in this investigation, the thermo-mechanical performance of two new tungsten-tantalum materials has been evaluated. Materials with We5wt.%Ta and We15wt.%Ta were processed by mechanical alloying (MA) and later consolidation by hot isostatic pressing (HIP), with distinct settings for each composition. Thus, it was possible to determine the relationship between the microstructure and the addition of Ta with the macroscopic mechanical properties. These were measured by means of hardness, flexural strength and fracture toughness, in the temperature range of 300e1473 K. The microstructure and the fracture surfaces features of the tested materials were analysed by Field Emission Scanning Electron Microscopy (FESEM).

More information

Item ID: 40472
DC Identifier: http://oa.upm.es/40472/
OAI Identifier: oai:oa.upm.es:40472
DOI: 10.1016/j.jnucmat.2015.10.034
Official URL: http://www.sciencedirect.com/science/article/pii/S0022311515302816
Deposited by: Memoria Investigacion
Deposited on: 31 May 2016 18:16
Last Modified: 24 Sep 2018 06:58
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