scholarly journals Multiscale Modeling of Grain-Boundary Fracture: Cohesive Zone Models Parameterized from Atomistic Simulations

2006 ◽  
Author(s):  
E Glaessgen ◽  
E Saether ◽  
D Phillips ◽  
V Yamakov
Keyword(s):  
Grain Boundary ◽  
Multiscale Modeling ◽  
Cohesive Zone ◽  
Atomistic Simulations ◽  
Cohesive Zone Models ◽  
Grain Boundary Fracture ◽  
Boundary Fracture

Atomistic Aspects of Crack Propagation Along High Angle Grain Boundaries

1996 ◽  
Vol 460 ◽  
Author(s):  
Diana Farkas
Keyword(s):  
Grain Boundary ◽  
Atomistic Simulations ◽  
High Angle ◽  
Brittle Behavior ◽  
Embedded Atom ◽  
Tilt Boundaries ◽  
Symmetrical Tilt ◽  
Grain Boundary Fracture ◽  
Tilt Grain Boundary ◽  
Boundary Fracture

ABSTRACTWe present atomistic simulations of the crack tip configuration near a high angle Σ= 5 [001](210) symmetrical tilt grain boundary in NiAl. The simulations were carried out using molecular statics and embedded atom (EAM) potentials. The cracks are stabilized near a Griffith condition involving the cohesive energy of the grain boundary. The atomistic configurations of the tip region are different in the presence of the high angle grain boundary than in the bulk. Three different configurations of the grain boundary were studied corresponding to different local compositions. It was found that in ordered NiAl, cracks along symmetrical tilt boundaries show a more brittle behavior for Al rich boundaries than for Ni-rich boundaries. Lattice trapping effects in grain boundary fracture were found to be more significant than in the bulk.

HYDROGEN EMBRITTLEMENT AND GRAIN BOUNDARY FRACTURE

1986 ◽  
pp. 717-722
Author(s):  
I.M. Robertson ◽  
T. Tabata ◽  
W. Wei ◽  
F. Heubaum ◽  
H.K. Birnbaum
Keyword(s):  
Hydrogen Embrittlement ◽  
Grain Boundary ◽  
Grain Boundary Fracture ◽  
Boundary Fracture

Detection of Hydrogen Release from the Grain Boundary Fracture Zone in 7075 Aluminum Alloy

PRICM ◽  
2013 ◽  
pp. 3403-3408
Author(s):  
Keitaro Horikawa ◽  
Shunsuke Hokazono ◽  
Kenichi Tanigaki ◽  
Hidetoshi Kobayashi
Keyword(s):  
Aluminum Alloy ◽  
Grain Boundary ◽  
Fracture Zone ◽  
Hydrogen Release ◽  
7075 Aluminum Alloy ◽  
Grain Boundary Fracture ◽  
Boundary Fracture
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