HIGH-RESOLUTION ELECTRON-MICROSCOPY OF GRAIN-BOUNDARIES IN NI-3(AL0.8TI0.2) BICRYSTALS .1. [001]SMALL-ANGLE TILT BOUNDARIES

Authors
EMORI H TAKASUGI T HIRAGA K
Citation
H. Emori et al., HIGH-RESOLUTION ELECTRON-MICROSCOPY OF GRAIN-BOUNDARIES IN NI-3(AL0.8TI0.2) BICRYSTALS .1. [001]SMALL-ANGLE TILT BOUNDARIES, Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties, 75(5), 1997, pp. 1403-1416
Citations number
25
Categorie Soggetti
Physics, Applied","Material Science","Physics, Condensed Matter","Metallurgy & Metallurigical Engineering
Journal title
Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties → ACNP
ISSN journal
13642804
Volume
75
Issue
5
Year of publication
1997
Pages
1403 - 1416
Database
ISI
SICI code
1364-2804(1997)75:5<1403:HEOGIN>2.0.ZU;2-7
Abstract
The grain-boundary structure of [001] small-angle tilt boundaries in L l(2)Ni(3)(Al0.8Ti0.2) bicrystals prepared by hot pressing was investig ated by high-resolution transmission electron microscopy. Dislocations with a Burgers vector a[100] which are dissociated into two superpart ials with Burgers vectors (a/2)[110] and (a/2)[<1(1)over bar0>] connec ted by an antiphase boundary (APE) were found. The dissociated superpa rtials and the corresponding APE lie along the grain-boundary plane. T he cores of the dissociated superpartials extend (or spread) over a fe w (011) atomic planes. Also, the preferred configuration of the disloc ation array observed was discussed on energy considerations.