Mechanical Fatigue Testing of a TF-He-Inlet Prototype at Cryogenic Temperature

Author

Weiss, K.-P. ; Purr, B. ; Westenfelder, S. ; Boyer, C. ; Foussat, Arnaud

Author_Institution

Karlsruhe Inst. of Technol.-KIT, Eggenstein-Leopoldshafen, Germany

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

4

Abstract

During the superconducting magnet program for ITER, various cryogenic components need to be tested verifying their design. In the past a Helium inlet of the TF coil was tested under fatigue in 2005 following ASME criteria for fatigue qualification. However, this very first prototype achieved only 80% of the projected fatigue cycles. Looking at the breaking region it was concluded that an annealing of the HAZ took place during the welding process leading to a weakening of the metal possibly due to a poorly controlled weld.

Keywords

annealing; cryogenics; fatigue testing; helium; superconducting magnets; welding; ASME criteria; HAZ; He; ITER; TF coil; TF-helium-inlet prototype; annealing; clamping system; controlled weld; cryogenic components; cryogenic temperature; fatigue life; fatigue qualification; jacket; manufacture process; mechanical fatigue testing; metal; superconducting magnet program; void fraction; welding process; Coils; Fatigue; Helium; Loading; Prototypes; Strain; Welding; Fatigue; fusion reactor design; superconducting coil; toroidal magnetic field;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2284022

Filename

6620950