Effect of nanotwin and dislocation pileup at twin boundary on dislocation emission from an interfacial collinear crack tip in nanocrystalline bimaterials

2019 ◽  
Vol 27 (12) ◽  
pp. 965-974
Author(s):  
Xianghua Peng ◽  
Min Yu ◽  
Youwen Liu
Keyword(s):  
Twin Boundary ◽  
Crack Tip ◽  
Dislocation Emission ◽  
Dislocation Pileup ◽  
Collinear Crack

Atomistic Study of Cleavage and Dislocation Emission in NiAl

1994 ◽  
Vol 364 ◽  
Author(s):  
M. Ludwig ◽  
P. Gumbsch
Keyword(s):  
Finite Element ◽  
Mixed Mode ◽  
Crack Tip ◽  
Mode I ◽  
Crack Plane ◽  
Dislocation Emission ◽  
Dislocation Generation ◽  
Embedded Atom ◽  
Atomistic Study ◽  
Eam Potential

AbstractThe atomistic processes during fracture of NiAl are studied using a new embedded atom (EAM) potential to describe the region near the crack tip. To provide the atomistically modeled crack tip region with realistic boundary conditions, a coupled finite element - atomistic (FEAt) technique [1] is employed. In agreement with experimental observations, perfectly brittle cleavage is observed for the (110) crack plane. In contrast, cracks on the (100) plane either follow a zig-zag path on (110) planes, or emit dislocations. Dislocation generation is studied in more detail under mixed mode I/II loading conditions.

Crack-tip dislocation emission arrangements for equilibrium—III. Application to large applied stress intensities

1992 ◽  
Vol 40 (11) ◽  
pp. 2883-2894 ◽  
Author(s):  
P.G. Marsh ◽  
W. Zielinski ◽  
H. Huang ◽  
W.W. Gerberich
Keyword(s):  
Applied Stress ◽  
Crack Tip ◽  
Dislocation Emission

scholarly journals Direct Observation of Dislocation Emission from a Crack Tip in YSZ

Materia Japan ◽  
2005 ◽  
Vol 44 (12) ◽  
pp. 998-998
Author(s):  
Takeo Sasaki ◽  
Satoshi Tanaka ◽  
Takahisa Yamamoto ◽  
Katsuyuki Matsunaga ◽  
Yuichi Ikuhara
Keyword(s):  
Direct Observation ◽  
Crack Tip ◽  
Dislocation Emission
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