Interface sliding in α-β brass two-phase bicrystals

✍ Scribed by Takayuki Takasugi; Osamu Izumi

• Publisher: Elsevier Science
• Year: 1980
• Weight: 965 KB
• Volume: 28
• Category: Article
• ISSN: 0001-6160
• DOI: 10.1016/0001-6160(80)90136-4

✦ Synopsis

Abntmct-Some typical characteristics for the phase boundary sliding are represented using the planar interface plane of the a(f.c.c+&.c.c.) brass two-phase bicrystals made by the solid state diffusion couple method. The sliding displacement decreased with distance from the half edge face of the /?-phase single crystal on which the weight was loaded. This variation was related to the deformation of the single crystal matrix, in particular, the b-phase single crystal. The high sliding velocity was investigated on the interfaa plane and some bicrystais showed 'slide softening' in contrary to the 'slide hardening' reported on most grain boundary sliding studies. Furthermore, it became obvious that the interface sliding process was strongly dependent upon the nature of the interfaa, i.e. the crystallographic orientation relationship, shear direction and microstructure of the interfaa. These results were consistent with a model of sliiing based on the movement of the extrinsic interface dislocation which were injected by the deformation of the single crystal matrix.

R&umCNous

presentons quelques caracteristiques essentielles du ghssement aux joints interphases, dans le cas de I'interface plan entre la phase a (c.f.c.) et la phase fl (c.c.) dans des bicristaux de laiton diphas&, fabriques par la methode du couple de diffusion en phase solide. Le glissement diminuait lorsqu'on s%cartait de la face du monocristal de phase beta sur lequel on appliquait la charge. Nous