Self-passivating W-Cr-Y alloys: characterization and testing

Calvo, A. and García-Rosales, C. and Ordás, N. and Iturriza, I. and Schlueter, K. and Koch, F. and Pintsuk, G. and Tejado Garrido, Elena María and Pastor Caño, Jose Ignacio (2016). Self-passivating W-Cr-Y alloys: characterization and testing. In: "29th Symposium on Fusion Technology (SOFT 2016)", 05/09/2016-09/09/2016, Praga, República Checa. pp. 1-4.

Description

Title: Self-passivating W-Cr-Y alloys: characterization and testing
Author/s:
  • Calvo, A.
  • García-Rosales, C.
  • Ordás, N.
  • Iturriza, I.
  • Schlueter, K.
  • Koch, F.
  • Pintsuk, G.
  • Tejado Garrido, Elena María
  • Pastor Caño, Jose Ignacio
Item Type: Presentation at Congress or Conference (Article)
Event Title: 29th Symposium on Fusion Technology (SOFT 2016)
Event Dates: 05/09/2016-09/09/2016
Event Location: Praga, República Checa
Title of Book: Proceedings of 29th Symposium on Fusion Technology (SOFT 2016)
Date: 2016
Subjects:
Freetext Keywords: Tungsten; self-passivating alloy; oxidation behavior; yttrium; thermo-shock
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

The use of self-passivating tungsten alloys for the first wall armor of future fusion reactors is advantageous concerning safety issues in comparison with pure tungsten. Bulk W-10Cr-0.5Y alloy manufactured by mechanical alloying followed by HIP resulted in a fully dense material with grain size around 100 nm and a dispersion of Y-rich oxide nanoparticles located at the grain boundaries. An improvement in flexural strength and fracture toughness was observed with respect to previous works. Oxidation tests under isothermal and accident-like conditions revealed a very promising oxidation behavior for the W-10Cr-0.5Y alloy. Thermo-shock tests at JUDITH-1 to simulate ELM-like loads resulted in a crack network at the surface with roughness values lower than those of a pure W reference material. An additional thermal treatment at 1550 °C improves slightly the oxidation and thermo-shock resistance of the alloy.

Funding Projects

TypeCodeAcronymLeaderTitle
Horizon 2020633053EUROfusionSantiago Badia RodríguezImplementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium
UnspecifiedELKARTEK KK-2015/00101FRONTIERJosé Luis Vilas VilelaSuperficies multifuncionales en la frontera del conocimiento

More information

Item ID: 46604
DC Identifier: http://oa.upm.es/46604/
OAI Identifier: oai:oa.upm.es:46604
Official URL: http://www.euro-fusionscipub.org/archives/eurofusion/self-passivating-tungsten-alloys-of-the-system-w-cr-y-characterization-and-testing
Deposited by: Memoria Investigacion
Deposited on: 09 Jun 2017 13:12
Last Modified: 24 Sep 2018 07:02
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