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Grill, R.

Paper Title Page
MOPEB072 Tracking of RRR Value and Microstructure in High Purity Niobium along the Production Chain from the Ingot to the Finished Cavity 435
 
  • S. Grawunder, F. Schoelz, B. Spaniol
    W.C. Heraeus GmbH, Materials Technology Dept., Hanau
  • R. Grill, W. Simader
    Plansee Metall GmbH, Reutte
  • M. Heilmaier, D. Janda
    TU Darmstadt, Darmstadt
  • W. Singer, X. Singer
    DESY, Hamburg
  
 

The RRR value of high pure Nb is showing strong relations to the individual production steps. Mainly the different kind of internal stresses caused by the several production steps are resulting in the variation of the RRR value. This work shows the RRR values along the complete production chain from the molten Ingot till to the finished cavity. The influence of the RRR value caused by stresses and the release of that stresses by vacuum annealing is shown.