Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Large-Scale Tungsten Fibre-Reinforced Tungsten and Its Mechanical Properties

Daniel Schwalenberg
,
Jan Coenen
* ORCID logo ,
Johann Riesch
,
Till Hoeschen
ORCID logo ,
Yiran Mao
,
Alexander Lau
ORCID logo ,
Hanns Giet
,
Leonard Raumann
ORCID logo ,
Philipp Huber
,
Christian Linsmeier
ORCID logo ,
Rudolf Neu
Version 1 : Received: 10 October 2022 / Approved: 11 October 2022 / Online: 11 October 2022 (10:41:08 CEST)

A peer-reviewed article of this Preprint also exists.

Schwalenberg, D.; Coenen, J.W.; Riesch, J.; Hoeschen, T.; Mao, Y.; Lau, A.; Gietl, H.; Raumann, L.; Huber, P.; Linsmeier, C.; Neu, R. Large-Scale Tungsten Fibre-Reinforced Tungsten and Its Mechanical Properties. J. Nucl. Eng. 2022, 3, 306-320. Schwalenberg, D.; Coenen, J.W.; Riesch, J.; Hoeschen, T.; Mao, Y.; Lau, A.; Gietl, H.; Raumann, L.; Huber, P.; Linsmeier, C.; Neu, R. Large-Scale Tungsten Fibre-Reinforced Tungsten and Its Mechanical Properties. J. Nucl. Eng. 2022, 3, 306-320.

Abstract

Tungsten fibre-reinforced tungsten composites (Wf/W) have been in development to overcome the inherent brittleness of tungsten as one of the most promising candidate for the first wall and divertor armour material in a future fusion power plant. As the development of Wf/W continues, the fracture toughness of the composite is one of the main design drivers. In this contribution the efforts on size upscaling of Wf/W based on Chemical Vapour Deposition (CVD) is shown together with fracture mechanical tests of two different size samples of Wf/W produced by CVD. Three-point bending tests according to ASTM E399 for brittle materials were used to get a first estimation of the toughness. A provisional fracture toughness value of up to 346MPam1/2 was calculated for the as-fabricated material. As the material does not show a brittle fracture in the as-fabricated state, the J-Integral approach based on the ASTM E1820 was additionally applied for this state. A maximum value of the J-integral of 41kJ/m2 (134,8MPam1/2) was determined for the largest samples. Post mortem investigations were employed to detail the active mechanisms and crack propagation.

Keywords

Composite; Fusion; Materials; Tungsten

Subject

Chemistry and Materials Science, Metals, Alloys and Metallurgy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Download PDF

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Metrics 0
Get PDF Cite Share 0
Bookmark BibSonomy Mendeley Reddit Delicious
×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.