Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.64: Poster
Thursday, March 19, 2026, 13:45–15:45, Redoutensaal
High-strength material for fusion reactor magnet sections — •Fareeha Ashraf1,2, Zahra Abbasi2, and Klaus-Peter Weiss2 — 1IGVP, University of Stuttgart, Germany — 2Karlsruhe Institute of Technology (KIT) , Institute for Technical Physics, Germany
The demand for high-strength materials for the mag- net sections of future fusion reactors requires a struc- tural material that can sustain exceptional mechani- cal performance at cryogenic temperatures. Conven- tionally used steels, such as 316LN, JK2LB, Incoloy 908, and JJ1, face limitations in achieving the tar- get properties of Yield Strength yield strength yield strength (YS) > 1500 MPa and fracture toughness (KIC)> 130 MPa m1/2. XM-19, a non-magnetic, Corrosion-resistant austenitic stainless steel offers high strength and toughness; however, its perfor- mance at cryogenic temperatures has not yet been finalized. This work focuses on XM-19 manufactured by controlled casting, forging, and heat-treatment routes. The mechanical testing, including tensile testing, fracture toughness evaluation, and fatigue assessment, combined with optical and electron mi- croscopy, will be used to correlate material response with deformation modes, grain characteristics, and precipitate stability. The results focus on the struc- tural evaluation of XM-19 under cryogenic opera- tions and its potential for large-scale fusion applica- tions.
Keywords: XM-19; cryogenic behavior; microstructural evolution; fusion magnet structures