Abstract
The segments of tubes made of austenitic 316LN-IG stainless steel that are cut along the tube axis are subjected to tensile tests in liquid and gaseous helium at temperatures below 7 K. The tubes are intended for the conductor conduits of the toroidal magnetic system of ITER. The time evolution of the strain, the temperature, and the strain-induced magnetization of specimens in the form of the normal component of the magnetic field on their surfaces is studied as a function of the applied load. The behavior of local deformation near slip bands is complicated: the areas near slip planes undergo unloading and shrinking. A magnetoelastic effect is detected; it indicates a negative longitudinal magnetostriction for the initial γ phase and the strain-induced α phase. The cases of absent local heating during strain jumps are explained by the magnetocaloric effect in the areas unloaded during slip.
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Original Russian Text © A.V. Krivykh, A.V. Irodova, V.E. Keilin, 2015, published in Zhurnal Tekhnicheskoi Fiziki, 2015, Vol. 85, No. 1, pp. 73–79.
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Krivykh, A.V., Irodova, A.V. & Keilin, V.E. Magnetoelastic effect during the low-temperature deformation of 316LN-IG stainless steel. Tech. Phys. 60, 72–78 (2015). https://doi.org/10.1134/S106378421501017X
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DOI: https://doi.org/10.1134/S106378421501017X