Accession Number:

ADA458861

Title:

Hot Working of High-Purity Nickel-Niobium Alloys (Preprint)

Descriptive Note:

Conference paper

Corporate Author:

ECOLE NATIONALE SUPERIEURE DES MINES SAINT-ETIENNE (FRANCE)

Report Date:

2006-04-01

Pagination or Media Count:

9.0

Abstract:

The present work deals with the influence of niobium in solid solution on the dynamic recrystallization of pure nickel. High-purity nickel and two model nickel-niobium alloys were deformed to large strains via torsion at temperatures between 800 and 1000C. Niobium additions considerably increased the flow stress, while they lowered the strain-rate sensitivity and increased the apparent activation energy. EBSD of the steady-state microstructures revealed strong grain refinement. Substructure development was favored, whereas thermal twinning was reduced by niobium. More generally, discontinuous recrystallization kinetics were considerably decreased.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE