| Numéro |
J. Phys. Colloques
Volume 49, Numéro C5, Octobre 1988
Interface Science and Engineering '87An International Conference on the Structure and Properties of Internal Interfaces |
|
|---|---|---|
| Page(s) | C5-641 - C5-645 | |
| DOI | https://doi.org/10.1051/jphyscol:1988582 | |
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-641-C5-645
DOI: 10.1051/jphyscol:1988582
STRUCTURE OF SMALL ANGLE TILT BOUNDARIES AND THEIR BEHAVIOR UNDER THE APPLIED SHEAR STRESSES IN fcc METALS
Y. MINONISHI1 et R. HORIUCHI21 Institute for Materials Research, Tohoku University, Sendai 980, Japan
2 The Institute of Space and Astronautical Science, Komada 4-6-1, Meguro-ku, Tokyo 153, Japan
Abstract
A molecular statics study has been performed on <112> symmetrical tilt boundaries in fcc metals using pair potentials fitted to Cu and Ni. Boundaries are found to consist of a pair of walls of Shockley partials in both metals ; distance between walls is much smaller than that between partials of an isolated extended dislocation. The separation between partial dislocation walls decreases with the increasing tilt angle and boundaries eventually come to have different structures from those observed in lower angle boundaries when the tilt angle exceeds a critical value depending on the potentials used. The critical shear strain for motion of the boundaries increases with the increasing tilt angle which is in good qualitative agreement with experimental observations so far reported.