Accession Number : AD0718964

Title :   Directional Solidification of an Off-Eutectic Aluminum-Beryllium Alloy.

Descriptive Note : Technical rept. Jan 67-Sep 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Pepper,Roger T. ; Wilcox,William R.

Report Date : 05 FEB 1971

Pagination or Media Count : 32

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)

Descriptors :   (*ALUMINUM ALLOYS, *COMPOSITE MATERIALS), (*REINFORCING MATERIALS, *BERYLLIUM), BERYLLIUM ALLOYS, ALIGNMENT, ZONE MELTING, FREEZING

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE