Recently there has been increased interest in exploring stellarator concept of design and manufacturing of fusion devices (reactors). A total of seven new studies [1 – 7] have been reported in a special issue of Journal of Plasma Physics enumerating various aspects of this approach mostly encircled around using so called modeling and simulation techniques (Monte carlo codes and approaches) to present simulation results and hypothesizing practical construction (so called Infinity 2 (a high magnetic field (= 9 T) device )) on its basis. Traditional softwares and various open source codes and their variants are used. However, a very fundamental material property is totally ignored. It is well known that rapidly changing and switching magnetic fields cause hysteresis and fatigue in a material and decrease its fatigue life [8 – 9]. This has very important and serious implications in design of Stellarators whose main functions are reliant of this very important feature and property. This was previously shown by author to be a dominant factor in design of high field magnets. This is also emphasized in another very recent study [10] in which fatigue is shown to be a function of current density in Li ion batteries. This study addresses this problem and proposes methods, experiments and approaches to test fatigue properties of material in question by drawing SN curves, Woehler diagrams and experimentally measuring fatigue or endurance limits.
References
Hegna, C.C. et al. (2025) ‘The Infinity Two fusion pilot plant baseline plasma physics design’, Journal of Plasma Physics, 91(3), p. E76. doi:10.1017/S0022377825000364.
Carbajal, L. et al. (2025) ‘Alpha-particle confinement in Infinity Two Fusion Pilot Plant baseline plasma design’, Journal of Plasma Physics, pp. 1–30. doi:10.1017/S0022377825000352.
Bader, A. et al. (2025) ‘Power and particle exhaust for the Infinity Two fusion pilot plant’, Journal of Plasma Physics, 91(2), p. E67. doi:10.1017/S0022377825000273.
Anderson, D.T. et al. (2025) ‘A comprehensive, unified baseline physics design for the type one energy stellarator fusion pilot power plant, “Infinity Two”’, Journal of Plasma Physics, 91(2), p. e65. doi:10.1017/S0022377825000297.
Guttenfelder, W. et al. (2025) ‘Predictions of core plasma performance for the Infinity Two Fusion Pilot Plant’, Journal of Plasma Physics, pp. 1–40. doi:10.1017/S0022377825000339.
Schmitt, J.C. et al. (2025) ‘Magnetohydrodynamic equilibrium and stability properties of the Infinity Two fusion pilot plant’, Journal of Plasma Physics, pp. 1–39. doi:10.1017/S0022377825000406.
Clark, D.W.S. et al. (2025) ‘Breeder blanket and tritium fuel cycle feasibility of the Infinity Two Fusion Pilot Plant’, Journal of Plasma Physics, pp. 1–48. doi:10.1017/S002237782500039X.
Dieter, G. and G.E. Dieter, Mechanical Metallurgy. 2014: CreateSpace Independent Publishing Platform.
Abbaschian, R. and L. Abbaschian, Physical Metallurgy Principles. 2024: Cengage Learning.
Wang, T., et al., Fatigue of Li metal anode in solid-state batteries. Science, 2025. 388(6744): p. 311-316.
Muhammad Musaddique Ali Rafique 