Accession Number : AD0771028

Title :   The Influence of Alloy Additions on the Structure of Undercooled Copper Ingots,

Corporate Author : DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)

Personal Author(s) : Southin,R. T. ; Weston,G. M.

Report Date : 21 MAR 1973

Pagination or Media Count : 8

Abstract : A study has been made of the structures of ingots solidified from undercooled melts of copper alloys containing up to 0.1 wt% P, 0.1 wt% S or 1.6 wt% Fe. Two types of grain refinement were identified, one due to dendrite disintegration, and the other due to a recrystallization phenomenon. The recrystallization phenomenon. Metallographic observations support the theory that grain refinement by dendrite disintegration was caused by a coarsening mechanism and not by dendrite arm remelting, and that the recrystallization effect was due to dendrite arm misalignment during the early stages of growth. (Modified author abstract)

Descriptors :   *Copper, *Grain size, *Additives, Solidification, Sulfur, Iron, Phosphorus, Dendritic structure, Recrystallization, Australia

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE