Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 32, Issue 4, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2022.3146819
Keywords
Strain; Niobium; Microstructure; Grain size; Elongation; Temperature dependence; Annealing; Deformation; high-purity Nb; heat treatment; recrystallization; RRR; SRF cavities
Funding
- SC TVEL
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This paper presents the study results on the influence of deformation route, true strain value, and recrystallization heat treatment regimes on the structural and mechanical characteristics of high-purity niobium sheets. It aims to develop manufacturing regimes that meet the requirements for superconducting cavity applications.
Accelerators are used in many areas of modern science and technology (FCC-ee, CEPC, ILC, ESS, MYRRHA, etc.). One of the main elements of accelerators is the superconducting cavity based on high-purity niobium sheets. In addition to RRR requirements (over 300) niobium sheets for the SRF cavities should meet rather tough requirements for the grain size, recrystallization degree and mechanical properties. Development of the manufacture regimes of the niobium sheets with the required characteristics for the SRF cavities is a promising and relevant task. The paper presents the study results of the deformation route, true strain value, recrystallization heat treatment regimes influence on the structural and mechanical characteristics of the high-purity niobium sheets.
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