MESOSCOPIC STRESS-FIELD ARISING FROM THE GRAIN INTERACTION IN PLASTICALLY DEFORMED POLYCRYSTALS

Citation
Aa. Zisman et Vv. Rybin, MESOSCOPIC STRESS-FIELD ARISING FROM THE GRAIN INTERACTION IN PLASTICALLY DEFORMED POLYCRYSTALS, Acta materialia, 46(2), 1998, pp. 457-464
Citations number
21
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
ISSN journal
13596454
Volume
46
Issue
2
Year of publication
1998
Pages
457 - 464
Database
ISI
SICI code
1359-6454(1998)46:2<457:MSAFTG>2.0.ZU;2-7
Abstract
Under consideration is the stress field arising in a plastically defor med polycrystal since its misoriented grains are subjected to differen t plastic strains. To analyse that, a two-dimensional model has been t aken that allows for intergranular stress sources and comprises a fini te aggregate of the grains together with its continuous surroundings o f mean polycrystal properties. Within the scope of this model the stre ss field is analytically evaluated for three adjoined grains, special attention being given to the singularity at the triple junction line. Related features of the shear and hydrostatic stress components are re spectively considered to actuate the low-angle boundary emission and t he conglomeration of point defects. (C) 1998 Acta Metallurgica Inc.