EXCESS ENERGY AND DIFFUSION MECHANISM IN COINCIDENCE GRAIN BOUNDARIES

1996 ◽  
pp. 535-540 ◽  
Author(s):  
H. KITAGAWA ◽  
A. NAKATANI ◽  
S. OGATA ◽  
K. SAITOH
Keyword(s):  
Grain Boundaries ◽  
Diffusion Mechanism ◽  
Excess Energy ◽  
And Diffusion

Structural and Mechanical Properties of Nanophase Ni: A Molecular-Dynamics Study of the Influence of Grain-Boundary Structure on Elastic and Plastic Behavior

1997 ◽  
Vol 492 ◽  
Author(s):  
H. Van Swygenhoven ◽  
M. Spaczér ◽  
A. Caro
Keyword(s):  
Molecular Dynamics ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Diffusion Mechanism ◽  
Distribution Functions ◽  
Boundary Structure ◽  
Plastic Behavior ◽  
Self Diffusion ◽  
Common Neighbour ◽  
Grain Boundary Structure

ABSTRACTMolecular dynamics computer simulations of high load plastic deformation at temperatures up to 500K of Ni nanophase samples with mean grain size of 5 nm are reported. Two types of samples are considered: a polycrystal nucleated from different seeds, each having random location and random orientation, representing a sample with mainly high angle grain boundaries, and polycrystals with seeds located at the same places as before, but with a limited missorientation representing samples with mainly low angle grain boundaries. The structure of the grain boundaries is studied by means of pair distribution functions, coordination number, atom energetics, and common neighbour analysis. Plastic behaviour is interpreted in terms of grain-boundary viscosity, controlled by a self diffusion mechanism at the disordered interface activated by thermal energy and stress.

scholarly journals Nonequilibrium evolution thermodynamic of poly- and two-components alloys affected by severe plastic deformation

2021 ◽  
Vol 2052 (1) ◽  
pp. 012026
Author(s):  
L Metlov ◽  
M Gordey
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Grain Boundaries ◽  
Kinetic Equations ◽  
Copper Matrix ◽  
Structural Defects ◽  
Two Component ◽  
Diffusion Phase ◽  
Qualitative Phase ◽  
And Diffusion

Abstract The nonequilibrium evolutionary thermodynamics approach is generalized to the case of alloys prone to structural martensitic and diffusion phase transitions in them. A system of kinetic equations is written out to describe the evolution of the density of structural defects, grain boundaries, dislocations and point defects, as well as for the order parameter in the processing of these alloys by the severe plastic deformation way. The approach is illustrated by the numerical experiments results on a specific example of two-component copper-based alloys. Kinetic curves of the evolution of the grain boundaries, dislocations and atoms dissolved in a copper matrix are obtained, qualitative phase diagrams are constructed.

Review of Urban Traffic Congestion Formation and Diffusion Mechanism

CICTP 2015 ◽  
2015 ◽  
Author(s):  
Changfen Zhang ◽  
Han Bai ◽  
Shunchao Wang ◽  
Changyu Xie
Keyword(s):  
Traffic Congestion ◽  
Diffusion Mechanism ◽  
Urban Traffic ◽  
And Diffusion

Formation and diffusion mechanism of histamine in the muscle of tuna fish

Food Control ◽  
2009 ◽  
Vol 20 (10) ◽  
pp. 923-926 ◽  
Author(s):  
Zhihua Tao ◽  
Minoru Sato ◽  
Toshiyasu Yamaguchi ◽  
Toshiki Nakano
Keyword(s):  
Diffusion Mechanism ◽  
Tuna Fish ◽  
And Diffusion

Effect of doping Hf on the hydrogen dissociation and diffusion mechanism on the ZrCo (110) surface

2019 ◽  
Vol 483 ◽  
pp. 383-390 ◽  
Author(s):  
Qingqing Wang ◽  
Xianggang Kong ◽  
Huilei Han ◽  
Ge Sang ◽  
Guanghui Zhang ◽  
...  
Keyword(s):  
Diffusion Mechanism ◽  
Hydrogen Dissociation ◽  
And Diffusion ◽  
Effect Of Doping
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