Accession Number : AD0710807
Title : FIRST AND SECOND ORDER PHASE CHANGES IN SPLAT COOLED Au-Cd AND Au-Zn ALLOYS.
Descriptive Note : Technical rept.,
Corporate Author : POLYTECHNIC INC OF BROOKLYN N Y DEPT OF PHYSICAL AND ENGINEERING METALLURGY
Personal Author(s) : Ferraglio,Paul ; Mukherjee,K. ; Castleman,L. S.
Report Date : AUG 1969
Pagination or Media Count : 31
Abstract : X-ray diffraction, transmission electron microscopy and selected area electron diffraction studies were performed on splat cooled equi-atomic Au-Cd and Au-Zn alloys. A vertical shock-tube apparatus is used for splat quenching samples from various temperatures. A substantial increase in superlattice line intensities were observed for both alloys after splat cooling. This result was tentatively interpreted in terms of the formation of preferential sublattice vacancies. A new morphology and crystal structure of the martensitic phase in splat cooled Au-Cd alloy were observed and a periodically faulted martensite like phase was observed in a splat cooled 50 at.% Au-Zn alloy. Also observed in the splat cooled Au-Zn alloy was a hitherto unreported modulated structure. (Author)
Descriptors : (*GOLD ALLOYS, PHASE STUDIES), CADMIUM ALLOYS, ZINC ALLOYS, COOLING, GRAIN STRUCTURES(METALLURGY)
Subject Categories : Properties of Metals and Alloys
Distribution Statement : APPROVED FOR PUBLIC RELEASE