The Peierls-Nabarro model of the interfacial misfit dislocation array is an
alytically extended to a family of dislocations of greater widths. By adjus
ting a parameter, the width of the misfit dislocations, the distribution of
the shear stress, and the restoring force law can be systematically varied
. The smaller the amplitude of the restoring force, the wider the misfit di
slocations and the lower the interfacial energy. (C) 1999 Acta Metallurgica
Inc. Published by Elsevier Science Ltd. All rights reserved.