Accession Number : AD0663172

Title :   ON THE INTERACTION OF INCLUSIONS WITH MIGRATING GRAIN BOUNDARIES.

Descriptive Note : Technical rept.,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS DIV OF ENGINEERING AND APPLIED PHYSICS

Personal Author(s) : Ashby,M. F. ; Lewis,J.

Report Date : NOV 1967

Pagination or Media Count : 33

Abstract : The pinning force exerted by an inclusion or particle of a second phase on a migrating grain boundary is calculated, allowing for the nature of the inclusion-matrix interface. The shape of a grain boundary as it bulges between inclusions can be described by a differential equation which is solved numerically to obtain profiles of boundaries as they interact with inclusions. These profiles suggest that the pressure on a grain boundary, causing it to migrate, can be obtained experimentally by measuring the amount by which a boundary bulges between inclusions. This makes possible an experimental measurement of the pinning force exerted by a single inclusion. (Author)

Descriptors :   (*DEFECTS(MATERIALS), INTERACTIONS), (*GRAIN BOUNDARIES, INTERACTIONS), TRANSPORT PROPERTIES, FREE ENERGY, CRYSTAL DEFECTS, BOUNDARY VALUE PROBLEMS

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE