NDLI: Mechanical tests of the conduit tubes of a conductor for the Toroidal winding of the International Thermonuclear Experimental Reactor (ITER)

Content Provider	Springer Nature Link
Author	Krivykh, A. V. Anashkin, O. P. Keilin, V. E. Diev, D. N. Dinisilov, A. S. Shcherbakov, V. I. Tronza, V. I.
Copyright Year	2012
Abstract	Extremely stringent requirements, which include the impact toughness at the liquid-helium temperature, are imposed on the material of the conduit tubes for International Thermonuclear Experimental Reactor (ITER) Toroidal Field (TF) conductors. Modified 316LN-IG stainless steel is recommended as the conduit tube material. Steel 316LN-IG tube samples (both full-size samples and sub-sized samples) are subjected to mechanical tests at various stages of the process of conductor production: in the as-recieved state and after compacting, preliminary elongation by 2.5% at room temperature, and annealing at 650°C for 200 h in a pure helium gas atmosphere. The tests are carried out at room, liquid nitrogen, and liquid helium temperatures and satisfy the standards of the American Society of Mechanical Engineers (ASME and ASTM). The results of sub-size and full-size samples testing show that the last one gives more representative results to qualify the weld joints in liquid nitrogen. When the temperature decreases or the strain increases, the magnetization of the samples increases, especially in the weld area. Strain measurements with an extensometer demonstrate that the intracrystal processes occurring at the liquid-helium temperature can lead to a significant change in the local load, up to complete unloading in a deformation zone. Unusual local serrated deformation is observed with an extensometer installed in the weld area during tests in liquid helium: this deformation is the result of compressive jumps opposite to the loading direction.
Starting Page	1562
Ending Page	1568
Page Count	7
File Format	PDF
ISSN	10637842
Journal	Technical Physics
Volume Number	57
Issue Number	11
e-ISSN	10906525
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2012-11-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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