Back to Search
Start Over
Mechanical properties of niobium radio-frequency cavities
- Source :
- Materials Science and Engineering: A. 642:117-127
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Radio-frequency cavities made of bulk niobium are one of the components used in modern particle accelerators. The mechanical stability is an important aspect of cavity design, which typically relies on finite-element analysis simulations using material properties from tensile tests on sample. This contribution presents the results of strain and resonant frequency measurements as a function of a uniform pressure up to 620 kPa, applied to single-cell niobium cavities with different crystallographic structure, purity and treatments. In addition, burst tests of high-purity multi-cell cavities with different crystallographic structures have been conducted up to the tensile strength of the material. Finite-element analysis of the single-cell cavity geometry is in good agreement with the observed behavior in the elastic regime assuming a Young’s modulus value of 88.5 GPa and a Poisson’s ratio of 0.4, regardless of crystallographic structure, purity or treatment. However, the measured yield strength and tensile strength depend on crystallographic structure, material purity and treatment. In particular, the results from this study show that the mechanical properties of niobium cavities made from ingot material with large crystals are comparable to those of cavities made of fine-grain niobium.
- Subjects :
- Materials science
Mechanical Engineering
Niobium
chemistry.chemical_element
Modulus
Particle accelerator
Crystal structure
Condensed Matter Physics
law.invention
Crystallography
chemistry
Materials Science(all)
law
Mechanics of Materials
Ultimate tensile strength
General Materials Science
Radio frequency
Ingot
Composite material
Material properties
Subjects
Details
- ISSN :
- 09215093
- Volume :
- 642
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: A
- Accession number :
- edsair.doi.dedup.....a807590e888a7c7b240d08254e6ceaee
- Full Text :
- https://doi.org/10.1016/j.msea.2015.06.095