Characterization of rapidly solidified Al-Be-Li and Al-Be ribbons

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6731898

Oliver, W C; Wadsworth, J; Pelton, A R; Nieh, T G

Rapidly solidified Al-Be and La-Be-Li ribbons have been produced by a melt spinning technique. Differential scanning calorimetry (DSC) measurements were conducted with both binary and ternary ribbons. A direct comparison of DSC results from binary and ternary ribbons indicates that the presence of Be has little or no effect on the precipitation of Li containing phases in the Al matrix (i.e., in this respect the ternary behaves like a pseudo binary Al-Li alloy). Mechanical properties microprobe measurements (MPM) and transmission electron microscopy (TEM) have been carried out on ribbons with a variety of heat treatments. Preliminary results show that the strength of Al-Be-Li ribbons, as a function of aging temperature, exhibits complex behavior. Specifically, the hardness first decreases with increasing annealing temperature up to 185/sup 0/C, then increases with temperature up to 220/sup 0/C and then decreases again. The binary alloy is not as hard in the as melt spun condition, but also shows a peak around 220/sup 0/C. These results are explained in terms of precipitation of Li containing intermetallic compounds and Be from the matrix of the as melt spun alloys.

• Research Organization: Oak Ridge National Lab., TN (USA); Lockheed Palo Alto Research Labs., CA (USA); Notre Dame Univ., IN (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6731898
• Report Number(s): CONF-861207-80; ON: DE87006613
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
AGING
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
ANNEALING
BERYLLIUM ALLOYS
CALORIMETRY
COOLING
ELECTRON MICROSCOPY
FOILS
HARDNESS
HEAT TREATMENTS
LITHIUM ALLOYS
MECHANICAL PROPERTIES
MICROSCOPY
SPLAT COOLING
TRANSMISSION ELECTRON MICROSCOPY