Relationships between deformation and microstructure evolution and minimizing surface roughness after BCP processing in RRR Nb cavitites

T.R. Bieler ; D. Baars ; K.T. Hartwig ; C. Compton ; T.L. Grimm

关键词: CAVITIES;    DEFORMATION;    EXTRUSION;    GRAIN SIZE;    MICROSTRUCTURE;    NIOBIUM;    PROCESSING;    ROLLING;    ROUGHNESS;    TEXTURE ILC-Americas University-based Accelerator R&;   

DOI  :  10.2172/953204
RP-ID  :  Final Report
PID  :  OSTI ID: 953204
Others  :  Other: MSU research account 61-3273
Others  :  TRN: US201111%%64

学科分类：社会科学、人文和艺术（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Two strategies for improving the surface finish of niobium sheet used in superconducting radio frequency cavities were examined, using slices of single (or large-grain) material from an ingot, and equal channel angle extrusion (ECAE) preprocessing of ingot material to achieve a uniform and small grain size prior to subsequent rolling. The effect of these two processing paths on final microstructure, texture, and surface finish are discussed.