Directional Solidification of an Off-Eutectic Aluminum-Beryllium Alloy.
Abstract
Aligned fibers of beryllium in aluminum were obtained by zone melting of an aluminum 20 wt% beryllium alloy. Unfortunately, the fiber length was limited by periodic banding caused by freezing rate fluctuations. Thus, the ultimate strength was only about 11,000 psi and the elastic modulus 15,000,000 psi. Analytical expressions were found for the concentration perturbation caused by changes in freezing rate, both for progressive freezing with no convection and for zone melting with considerable liquid mixing. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 05, 1971
- Accession Number
- AD0718964
Entities
People
- Roger T. Pepper
- William R. Wilcox
Organizations
- The Aerospace Corporation