Grain boundary-dislocation interactions
نویسندگان
چکیده
منابع مشابه
Dislocation interactions mediated by grain boundaries
The dynamics of dislocation assemblies in deforming crystals indicates the emergence of collective phenomena, intermittent fluctuations and strain avalanches. In polycrystalline materials, the understanding of plastic deformation mechanisms depends on grasping the role of grain boundaries on dislocation motion. Here the interaction of dislocations and elastic, lowangle grain boundaries is studi...
متن کاملDirect visualization of dislocation dynamics in grain-boundary scars.
Mesoscale objects with unusual structural features may serve as the analogues of atoms in the design of larger-scale materials with novel optical, electronic or mechanical behaviour. In this paper we investigate the structural features and the equilibrium dynamics of micrometre-scale spherical crystals formed by polystyrene particles adsorbed on the surface of a spherical water droplet. The gro...
متن کاملDamage nucleation from repeated dislocation absorption at a grain boundary
Damage nucleation from repeated dislocation absorption at a grain boundary is simulated with molecular dynamics. At the grain boundary–dislocation intersection site, atomic shuffling events determine how the free volume brought by the incoming dislocation is accommodated. This process in turn determines the crack nucleation mechanism, as well as the critical strain and number of dislocations th...
متن کاملThe Dislocation-grain Boundary Interaction and Its Effect on the Boundary Dynamic Properties
The problem o f t h e i n t e r a c t i o n o f d i s loca t ions w i t h g r a i n boundaries i s d i s cussed on t h e bas is o f t h e concept o f g r a i n boundary non-equi l ibr ium s t a t e generat ion and recovery. According t o t h i s concept, trapped l a t t i c e d is loca t ions , being non-equil i b r i u m defects , are absorbed by t h e boundaries as they d issoc ia te i n t o ...
متن کاملFive-parameter grain boundary distribution in grain boundary engineered brass
We report the first application of a five-parameter determination of grain boundary types to grain boundary engineered alpha-brass. The most important findings were that the distribution of planes showed a prevalence of <110> tilt boundaries, especially asymmetric tilt types, and the presence of <111> twist boundaries. This distribution resulted from the low energy of these boundary types.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bulletin of Materials Science
سال: 1984
ISSN: 0250-4707,0973-7669
DOI: 10.1007/bf02743997