Observation of serrated deformation of superconducting magnets'windings

Anashkin, O.P.; Кейлин, В.Е.; Krivikh, A.V.

doi:10.1016/0011-2275(79)90104-8

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…Training occurs both in coils and in short samples of superconductors in the presence of stresses which cause plastic deformation of the material (Anashkin et al , 1975(Anashkin et al , , 1979Schmidt, 1976;Schmidt, 1978, 1979). From qualitative considerations, we shall discuss here the critical state stability in short s upe reonduc ting sample s in the presence of plastic yield of the material.…”

Section: E Flux Jumps and Training Of Superconductorsmentioning

confidence: 99%

Critical state stability in type-II superconductors and superconducting-normal-metal composites

1981

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Section: E Flux Jumps and Training Of Superconductorsmentioning

confidence: 99%

Critical state stability in type-II superconductors and superconducting-normal-metal composites

1981

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“…The sub-size samples were tested in the standard "Instron-1195" machine. Previously this machine was used at Kurchatov Institute to investigate mechanical properties of superconducting wires and windings at low temperatures and it is worthwhile to note that the serrated yielding of superconducting windings at LN 2 temperature was observed in these tests [2]. The full-size tubes were tested in the home-made F-250 machine.…”

Section: Tensile Machinesmentioning

confidence: 99%

Tensile tests of ITER TF conductors jacket materials

Anashkin¹,

Кейлин²,

Krivykh³

et al. 2012

AIP Conference Proceedings

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The set of very tough requirements has been formulated for TF jacket materials with extremely high plasticity at liquid helium temperature. The stainless steel 316LN-IG is recommended to be used for TF jacket tubes. Samples of 316LN-IG tubes (whole tubes and sub-size samples) made of the material from the same electro slag remelt have been tested in different conditions -as received tubes and tubes after prescribed compaction, 2.5% deformation at room temperature and heat treatment at 650 0 C, 200 hours. The tensile tests were carried out at room, liquid nitrogen and liquid helium temperatures down to 4.2 K, meeting corresponding ASME and ASTM requirements. The low temperature testing devices are described. The tests results for sub-size samples and whole tubes show that the latter tests are considerably more representative and important for butt weld qualification at LHe temperature. It was observed that the ferromagnetic properties of all samples and especially of butt welds increase with lowering the temperature and increasing the degree of deformation. At LHe temperature a non-uniform and highly localized serrated deformations were observed.

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