Accession Number : AD0734010

Title :   Effect of Fluid Flow on Solidification Structure.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s) : Schlecht,F. ; Rinaldi,M. ; Flemings,M. C.

Report Date : JAN 1971

Pagination or Media Count : 57

Abstract : It is shown that the simple constitutional supercooling theory derived for a binary alloy can be applied to a ternary alloy when certain conditions are met. The conditions required to unidirectionally solidify a composite three-component crystal with a planar interface are a steep temperature gradient in the liquid at the interface and a low growth rate; when the ratio of these two variables is sufficiently high, a three-phase crystal with a eutecticlike structure has been grown, even when the initial composition of the alloy was far from the eutectic composition. Alloys studied were of the Al-Cu-Ni system of different compositions on the line of two-fold saturation joining the ternary eutectic and the binary Al-NiAl3, and within the ternary tie-triangle. (Author)

Descriptors :   (*ALUMINUM ALLOYS, *CRYSTAL GROWTH), (*EUTECTICS, CRYSTAL GROWTH), COPPER ALLOYS, NICKEL ALLOYS, PHASE STUDIES, SUPERCOOLING

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE