Accession Number : AD0718941

Title :   A Model of Vacancy Flux Induced Segregation to Grain-Boundaries During Cooling,

Corporate Author : WATERLOO UNIV (ONTARIO) DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Bercovici,S. J. ; Hunt,C. E. L. ; Niessen,P.

Report Date : 31 DEC 1969

Pagination or Media Count : 6

Abstract : A recently developed method of analysis provided a direct measure of grain-boundary solute enrichment in slowly cooled Zn-Cd alloys as a function of holding temperature. These experimental data are here compared with the change of boundary solute enrichment computed from a model based on the vacancy flux generated uphill diffusion of solute to boundaries. The agreement between experiment and theory is satisfactory. This agreement is considered to be a direct proof that previously reported grain-boundary hardening of slowly cooled dilute alloys is a consequence of non-equilibrium solute adsorption. (Author)

Descriptors :   (*ZINC ALLOYS, HARDENING), (*HARDENING, *GRAIN BOUNDARIES), CADMIUM ALLOYS, MATHEMATICAL MODELS, TRANSPORT PROPERTIES, CANADA, COOLING

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE