Elevated Temperature Deformation and Electron Microscope Studies of Polycrystalline Tungsten and Tungsten-Rhenium Alloys
Abstract
Tungsten, tungsten-25 wt. % rhenium and tungsten-30 wt. % rhenium were plastically deformed from 1400 to 1900C at stresses up to 10,000 psi in a vacuum of less than 10 sub to 8 torr. The activation energy for creep and the relationship between stress and strain rate were determined. Effects of thermo-mechanical history, composition, and grain size on strain rate were also investigated. Dislocation substructure was studied by etch pit and transmission electron microscope techniques, and these observations were correlated with the creep data. The factors important in the high-temperature deformation of these materials were analyzed, and the experimental results were rationalized in terms of current theories for rate- controlling deformation mechanisms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1968
- Accession Number
- ADA382705
Entities
People
- Richard R. Vandervoort
- Willis L. Barmore
Organizations
- University of California