scholarly journals Misorientation Dependence of Grain Boundary Fracture Strength and Grain Boundary Energy for Molybdenum ⟨001⟩ Symmetric Tilt Boundaries

1999 ◽  
Vol 63 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Kenichi Ikeda ◽  
Koji Morita ◽  
Hideharu Nakashima ◽  
Hiroshi Abe
Keyword(s):  
Grain Boundary ◽  
Fracture Strength ◽  
Boundary Energy ◽  
Grain Boundary Energy ◽  
Symmetric Tilt ◽  
Tilt Boundaries ◽  
Grain Boundary Fracture ◽  
Boundary Fracture

scholarly journals Grain Boundary Fracture in Molybdenum Bicrystals with Various ⟨110⟩ Symmetric Tilt Boundaries

1985 ◽  
Vol 26 (5) ◽  
pp. 341-352 ◽  
Author(s):  
Hiroaki Kurishita ◽  
Akira Ôishi ◽  
Haruyoshi Kubo ◽  
Hideo Yoshinaga
Keyword(s):  
Grain Boundary ◽  
Symmetric Tilt ◽  
Tilt Boundaries ◽  
Grain Boundary Fracture ◽  
Boundary Fracture

Grain Boundary Structure and Its Energy of Symmetric Tilt Boundary in Copper

2004 ◽  
Vol 467-470 ◽  
pp. 807-812 ◽  
Author(s):  
Naoki Takata ◽  
Kenichi Ikeda ◽  
Fusahito Yoshida ◽  
H. Nakashima ◽  
Hiroshi Abe
Keyword(s):  
Grain Boundary ◽  
Free Volume ◽  
Atomic Structure ◽  
Boundary Energy ◽  
Tilt Boundary ◽  
Grain Boundary Energy ◽  
Structural Units ◽  
Symmetric Tilt ◽  
Tilt Boundaries ◽  
Symmetric Tilt Boundary

In the present study, grain boundary energy and atomic structure of <110> symmetric tilt boundaries in copper were evaluated by molecular dynamics (MD) simulation. From the simulations, the grain boundary energy of <110> symmetric tilt boundaries depended on misorientation angle and there were large energy cusps at the misorientation angles which corresponded to (111) S 3 and (113) S 11 symmetric tilt boundaries. It was found that the atomic structure of each <110> symmetric tilt boundary was described by the combination of three kinds of structural units which consisted of (331) S 19, (111) S 3 and (113) S 11 symmetric tilt boundaries and two single crystal units which consisted of (110) S 1and (001) S 1 single crystals. From the the analysis of the excess free volume in each grain boundary, it was found that the energy of structural units depended on the excess free volume of the units and that the misorientation dependence of grain boundary energy agreed with that of the free volume in grain boundaries.

scholarly journals Grain Boundary Energy and Atomic Structure of Symmetric Tilt Boundaries in Copper

2004 ◽  
Vol 68 (4) ◽  
pp. 240-246 ◽  
Author(s):  
Naoki Takata ◽  
Ken-ichi Ikeda ◽  
Fuyuki Yoshida ◽  
Hideharu Nakashima ◽  
Hiroshi Abe
Keyword(s):  
Grain Boundary ◽  
Atomic Structure ◽  
Boundary Energy ◽  
Grain Boundary Energy ◽  
Symmetric Tilt ◽  
Tilt Boundaries

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.

Grain-boundary fracture strength in Ni3Al bicrystals

2002 ◽  
Vol 82 (8) ◽  
pp. 1541-1557 ◽  
Author(s):  
Jian-Qing Su ◽  
M. Demura ◽  
T. Hirano
Keyword(s):  
Grain Boundary ◽  
Fracture Strength ◽  
Grain Boundary Fracture ◽  
Boundary Fracture

Grain-boundary fracture strength in Ni 3 Al bicrystals

2002 ◽  
Vol 82 (8) ◽  
pp. 1541-1557 ◽  
Author(s):  
Jian-Qing Su ◽  
M. Demura ◽  
T. Hirano
Keyword(s):  
Grain Boundary ◽  
Fracture Strength ◽  
Grain Boundary Fracture ◽  
Boundary Fracture
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