Nb tubes for seamless SRF cavities

S. Balachandran, R. C. Elwell, D. Kang, R. E. Barber, T. R. Bieler, K. T. Hartwig

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

Fabrication of niobium (Nb) superconducting radio frequency cavities by hydroforming is desirable because of production economy and mitigation of defects. Favorable material characteristics for hydroforming include: (a) good ductility, (b) sufficient strain hardening, and (c) microstructural homogeneity. Seamless Nb cavities are attractive because they do not contain welds. Welds can act as performance inhibitors due to defects, local chemistry changes, pits, etc. The objective of the work reported is to provide a cost-effective processing strategy involving severe plastic deformation and thermo-mechanical processing to produce uniform fine grain Nb microstructures in seamless RRR Nb tubes. An example of a successful implementation of the process is presented, which provides a fine grain size and possible texture control involving different strengths of [111]/ [100] component in the hoop direction. A fine grain size and suitable texture should lead to less deformation heterogeneity, better surface properties, and a lower tube failure rate from hydroforming.

Original languageEnglish (US)
Article number6422352
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
StatePublished - 2013
Externally publishedYes

Profile

niobium
Niobium
hydroforming
tubes
cavities
textures
grain size
defects
Preganglionic Autonomic Fibers
Accessory Nerve
Welds
Defects
Textures
hoops
strain hardening
economy
ductility
inhibitors
surface properties
plastic deformation

Keywords

  • Niobium
  • polycrystalline
  • seamless tube
  • superconducting radio frequency (SRF) cavities

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Balachandran, S., Elwell, R. C., Kang, D., Barber, R. E., Bieler, T. R., & Hartwig, K. T. (2013). Nb tubes for seamless SRF cavities. IEEE Transactions on Applied Superconductivity, 23(3), [6422352]. DOI: 10.1109/TASC.2013.2243492

Nb tubes for seamless SRF cavities. / Balachandran, S.; Elwell, R. C.; Kang, D.; Barber, R. E.; Bieler, T. R.; Hartwig, K. T.

In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 6422352, 2013.

Research output: Contribution to journalArticle

Balachandran, S, Elwell, RC, Kang, D, Barber, RE, Bieler, TR & Hartwig, KT 2013, 'Nb tubes for seamless SRF cavities' IEEE Transactions on Applied Superconductivity, vol 23, no. 3, 6422352. DOI: 10.1109/TASC.2013.2243492
Balachandran S, Elwell RC, Kang D, Barber RE, Bieler TR, Hartwig KT. Nb tubes for seamless SRF cavities. IEEE Transactions on Applied Superconductivity. 2013;23(3). 6422352. Available from, DOI: 10.1109/TASC.2013.2243492

Balachandran, S.; Elwell, R. C.; Kang, D.; Barber, R. E.; Bieler, T. R.; Hartwig, K. T. / Nb tubes for seamless SRF cavities.

In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 6422352, 2013.

Research output: Contribution to journalArticle

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