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Tungsten (W) Laminate Pipes for Innovative High Temperature Energy Conversion Systems
Author(s) -
Reiser Jens,
Rieth Michael,
Möslang Anton,
Greuner Henri,
Armstrong David E. J.,
Denk Thorsten,
Gräning Tim,
Hering Wolfgang,
Hoffmann Andreas,
Hoffmann Jan,
Leiste Harald,
Mrotzek Tobias,
Pippan Reinhard,
Schulmeyer Werner,
Weingärtner Tobias,
Zabernig Anton
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201400204
Subject(s) - tungsten , charpy impact test , materials science , foil method , toughness , metallurgy , brittleness , fracture toughness , composite material
The aim of this paper is to present the mechanical properties of tungsten laminate pipes made of tungsten foil and to discuss their use in innovative high temperature energy conversion systems. Tungsten is the metal with the highest melting point of all metals and would therefore be an excellent fit for high temperature applications. But tungsten has one major drawback which is its low fracture toughness at room temperature (RT) or its high brittle‐to‐ductile transition temperature (BDTT). However, one of the extraordinary properties of tungsten is that by cold working the BDTT can be shifted to lower temperatures. At the extreme, these results in a tungsten foil with a BDTT below −120 °C combined with an RT fracture toughness of 70 MPa m 1/2 . By rolling up and joining a tungsten foil, tungsten laminate pipes can be synthesized that can dissipate at least 20 J in a Charpy impact test at RT and survive a burst test at RT at 1000 bar without any residual damage. The technical maturity of these W laminate pipes is approved by high heat flux tests performed at the Plataforma Solar de Almería, Spain, as well as at the Max Planck Institute of Plasma Physics, Garching, Germany.