Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium

Thomas R. Bieler, Di Kang, Derek C. Baars, Saravan Chandrasekaran, Aboozar Mapar, Gianluigi Ciovati, Neil T. Wright, Farhang Pourboghrat, James E. Murphy, Chris C. Compton, Ganapati Rao Myneni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The physical and mechanical metallurgy underlying fabrication of large grain cavities for superconducting radio frequency accelerators is summarized, based on research of 1) grain orientations in ingots, 2) a metallurgical assessment of processing a large grain single cell cavity and a tube, 3) assessment of slip behavior of single crystal tensile samples extracted from a high purity ingot slice before and after annealing at 800 °C/2â...h, 4) development of crystal plasticity models based upon the single crystal experiments, and 5) assessment of how thermal conductivity is affected by strain, heat treatment, and exposure to hydrogen. Because of the large grains, the plastic anisotropy of deformation is exaggerated, and heterogeneous strains and localized defects are present to a much greater degree than expected in polycrystalline material, making it highly desirable to computationally anticipate potential forming problems before manufacturing cavities.

Original languageEnglish (US)
Title of host publicationScience and Technology of Ingot Niobium for Superconducting Radio Frequency Applications
PublisherAmerican Institute of Physics Inc.
Volume1687
ISBN (Electronic)9780735413344
DOIs
StatePublished - Dec 4 2015
Externally publishedYes
EventIngot Niobium Summary Workshop - Newport News, United States

Other

OtherIngot Niobium Summary Workshop
CountryUnited States
CityNewport News
Period12/4/15 → …

Profile

cavities
ingots
heat treatment
thermal conductivity
single crystals
defects
plastic anisotropy
metallurgy
plastic properties
niobium
radio frequencies
purity
accelerators
slip
manufacturing
tubes
fabrication
annealing
hydrogen
cells

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Bieler, T. R., Kang, D., Baars, D. C., Chandrasekaran, S., Mapar, A., Ciovati, G., ... Myneni, G. R. (2015). Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium. In Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications (Vol. 1687). [020002] American Institute of Physics Inc.. DOI: 10.1063/1.4935316

Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium. / Bieler, Thomas R.; Kang, Di; Baars, Derek C.; Chandrasekaran, Saravan; Mapar, Aboozar; Ciovati, Gianluigi; Wright, Neil T.; Pourboghrat, Farhang; Murphy, James E.; Compton, Chris C.; Myneni, Ganapati Rao.

Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications. Vol. 1687 American Institute of Physics Inc., 2015. 020002.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bieler, TR, Kang, D, Baars, DC, Chandrasekaran, S, Mapar, A, Ciovati, G, Wright, NT, Pourboghrat, F, Murphy, JE, Compton, CC & Myneni, GR 2015, Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium. in Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications. vol. 1687, 020002, American Institute of Physics Inc., Ingot Niobium Summary Workshop, Newport News, United States, 4 December. DOI: 10.1063/1.4935316
Bieler TR, Kang D, Baars DC, Chandrasekaran S, Mapar A, Ciovati G et al. Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium. In Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications. Vol. 1687. American Institute of Physics Inc.2015. 020002. Available from, DOI: 10.1063/1.4935316

Bieler, Thomas R.; Kang, Di; Baars, Derek C.; Chandrasekaran, Saravan; Mapar, Aboozar; Ciovati, Gianluigi; Wright, Neil T.; Pourboghrat, Farhang; Murphy, James E.; Compton, Chris C.; Myneni, Ganapati Rao / Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium.

Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications. Vol. 1687 American Institute of Physics Inc., 2015. 020002.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

@inbook{9490878aa63b4f7b8c34ea4486f32ffd,
title = "Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium",
abstract = "The physical and mechanical metallurgy underlying fabrication of large grain cavities for superconducting radio frequency accelerators is summarized, based on research of 1) grain orientations in ingots, 2) a metallurgical assessment of processing a large grain single cell cavity and a tube, 3) assessment of slip behavior of single crystal tensile samples extracted from a high purity ingot slice before and after annealing at 800 °C/2â...h, 4) development of crystal plasticity models based upon the single crystal experiments, and 5) assessment of how thermal conductivity is affected by strain, heat treatment, and exposure to hydrogen. Because of the large grains, the plastic anisotropy of deformation is exaggerated, and heterogeneous strains and localized defects are present to a much greater degree than expected in polycrystalline material, making it highly desirable to computationally anticipate potential forming problems before manufacturing cavities.",
author = "Bieler, {Thomas R.} and Di Kang and Baars, {Derek C.} and Saravan Chandrasekaran and Aboozar Mapar and Gianluigi Ciovati and Wright, {Neil T.} and Farhang Pourboghrat and Murphy, {James E.} and Compton, {Chris C.} and Myneni, {Ganapati Rao}",
year = "2015",
month = "12",
doi = "10.1063/1.4935316",
volume = "1687",
booktitle = "Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications",
publisher = "American Institute of Physics Inc.",

}

TY - CHAP

T1 - Deformation mechanisms, defects, heat treatment, and thermal conductivity in large grain niobium

AU - Bieler,Thomas R.

AU - Kang,Di

AU - Baars,Derek C.

AU - Chandrasekaran,Saravan

AU - Mapar,Aboozar

AU - Ciovati,Gianluigi

AU - Wright,Neil T.

AU - Pourboghrat,Farhang

AU - Murphy,James E.

AU - Compton,Chris C.

AU - Myneni,Ganapati Rao

PY - 2015/12/4

Y1 - 2015/12/4

N2 - The physical and mechanical metallurgy underlying fabrication of large grain cavities for superconducting radio frequency accelerators is summarized, based on research of 1) grain orientations in ingots, 2) a metallurgical assessment of processing a large grain single cell cavity and a tube, 3) assessment of slip behavior of single crystal tensile samples extracted from a high purity ingot slice before and after annealing at 800 °C/2â...h, 4) development of crystal plasticity models based upon the single crystal experiments, and 5) assessment of how thermal conductivity is affected by strain, heat treatment, and exposure to hydrogen. Because of the large grains, the plastic anisotropy of deformation is exaggerated, and heterogeneous strains and localized defects are present to a much greater degree than expected in polycrystalline material, making it highly desirable to computationally anticipate potential forming problems before manufacturing cavities.

AB - The physical and mechanical metallurgy underlying fabrication of large grain cavities for superconducting radio frequency accelerators is summarized, based on research of 1) grain orientations in ingots, 2) a metallurgical assessment of processing a large grain single cell cavity and a tube, 3) assessment of slip behavior of single crystal tensile samples extracted from a high purity ingot slice before and after annealing at 800 °C/2â...h, 4) development of crystal plasticity models based upon the single crystal experiments, and 5) assessment of how thermal conductivity is affected by strain, heat treatment, and exposure to hydrogen. Because of the large grains, the plastic anisotropy of deformation is exaggerated, and heterogeneous strains and localized defects are present to a much greater degree than expected in polycrystalline material, making it highly desirable to computationally anticipate potential forming problems before manufacturing cavities.

UR - http://www.scopus.com/inward/record.url?scp=84984571856&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84984571856&partnerID=8YFLogxK

U2 - 10.1063/1.4935316

DO - 10.1063/1.4935316

M3 - Conference contribution

VL - 1687

BT - Science and Technology of Ingot Niobium for Superconducting Radio Frequency Applications

PB - American Institute of Physics Inc.

ER -