Nb tubes for seamless SRF cavities

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

Research output: Research - peer-reviewArticle

  • 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.

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

Profile

niobium
tubes
cavities
Niobium
hydroforming
textures
grain size
defects
Welds
Textures
Defects
Processing
hoops
strain hardening
economy
ductility
inhibitors
surface properties
plastic deformation
homogeneity

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: Research - peer-reviewArticle

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. 2013 ; Vol. 23, No. 3.
@article{5c282d30bf0d4150becb1713072c3f71,
title = "Nb tubes for seamless SRF cavities",
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.",
keywords = "Niobium, polycrystalline, seamless tube, superconducting radio frequency (SRF) cavities",
author = "S. Balachandran and Elwell, {R. C.} and D. Kang and Barber, {R. E.} and Bieler, {T. R.} and Hartwig, {K. T.}",
year = "2013",
doi = "10.1109/TASC.2013.2243492",
volume = "23",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - Nb tubes for seamless SRF cavities

AU - Balachandran,S.

AU - Elwell,R. C.

AU - Kang,D.

AU - Barber,R. E.

AU - Bieler,T. R.

AU - Hartwig,K. T.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - Niobium

KW - polycrystalline

KW - seamless tube

KW - superconducting radio frequency (SRF) cavities

UR - http://www.scopus.com/inward/record.url?scp=84874844496&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874844496&partnerID=8YFLogxK

U2 - 10.1109/TASC.2013.2243492

DO - 10.1109/TASC.2013.2243492

M3 - Article

VL - 23

JO - IEEE Transactions on Applied Superconductivity

T2 - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3

M1 - 6422352

ER -