Sample size effects on grain boundary sliding

Grain Boundary Sliding in Ice

It is well known that grain boundary processes intercrystdline sliding and grain boundary migration make an important contribution to high temperature deformation of polycrystalline materials, particularly for metals. More recently, these processes have been correlated with the atomic structure of the boundaries. Our goal is to study sliding and migration of ice boundaries, with respect to temp...

Numerical Study of Grain Boundary Diffusion: Size Effects

1. Introduction Enhanced diffusivities along grain boundaries (GBs) are highly relevant for the preparation as well as for the performance of many polycrystalline materials. The importance of GBs is even further increased, if materials are characterized by a high density of interfaces. In such cases, for example in nanocrystalline materials, experiments to determine diffusion coefficients are n...

Effects of barley grain particle size on dairy cow performance

EFFECTS OF A BOUNDARY NODE ON GRAIN-BOUNDARY SLIDING AND INTERGRANULAR FRACTURE IN CU-9at.%Al TRICRYSTALS

1 I n t r o d u c t i o n E x p e r i m e n t s e m p l o y i n g o r i e n t a t i o n c o n t r o l l e d b i c r y s t a l s h a v e r e v e a l e d d e f o r m a t i o n a n d f r a c t u r e b e h a v i o r o f m a t e r i a l s w i t h s i n g l e b o u n d a r i e s a n d i t s r e l a t i o n t o t h e b o u n d a r y s t r u c t u r e / l 3 / . H o w e v e r , e f f e c t s o f b o u n...

Effects of grain boundary adhesion and grain size on ductility of thin metal films on polymer substrates

We have studied the effects of grain boundary adhesion and grain size on the ductility of thin metal films well bonded to polymer substrates, using a finite element method. It is shown that the ductility of polymer-supported metal films increases approximately linearly as the grain boundary adhesion increases, and as the grain size decreases. A rule-of-thumb estimate of the ductility of polymer...