Accession Number:

AD0718941

Title:

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

Descriptive Note:

Corporate Author:

WATERLOO UNIV (ONTARIO) DEPT OF MECHANICAL ENGINEERING

Report Date:

1969-12-31

Pagination or Media Count:

6.0

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

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE