Phase Changes in the Niobium-Hydrogen System. I. Accommodation Effects during Hydride Precipitation.
Abstract
The accommodation effects which accompany hydride precipitation were studied in the Nb-H system using T.E.M. Elastic accommodation and punching of prismatic dislocation loops in the solid solution matrix were observed on precipitation. The reversibility of the plastic accommodation processes was studied. Dislocation generation and motion in the hydride was observed during reversion. These observations were related to the volume changes due to hydride formation and to the thermodynamics of the phase change. Direct evidence for the inhibition of hydride precipitation due to trapping at O and N interstitials is presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1979
- Accession Number
- ADA075518
Entities
People
- B. J. Makenas
- Howard K. Birnbaum
Organizations
- University of Illinois Urbana–Champaign