Elastic interaction of a point defect with a prismatic dislocation loop in hexagonal crystals

1972 ◽  
Vol 43 (11) ◽  
pp. 4477-4482 ◽  
Author(s):  
M. H. Yoo ◽  
S. M. Ohr
Keyword(s):  
Point Defect ◽  
Dislocation Loop ◽  
Elastic Interaction ◽  
Hexagonal Crystals ◽  
Prismatic Dislocation Loop

scholarly journals BIAS OF BASAL DISLOCATION LOOP IN ZIRCONIUM

2021 ◽  
pp. 29-34
Author(s):  
A.V. Babich ◽  
P.N. Ostapchuk
Keyword(s):  
Numerical Calculation ◽  
Dislocation Loop ◽  
Point Defects ◽  
Function Method ◽  
Elastic Field ◽  
Its Region ◽  
Elastic Interaction ◽  
Basal Dislocation ◽  
Hexagonal Crystals ◽  
Toroidal Geometry

An analytical expression for the elastic interaction energy of radiation point defects of the dipole type with the basal dislocation loop of the hcp metal is obtained using the Green's function method for hexagonal crystals in the Krener approach. It was used for numerical calculation of the bias for the basal dislocation loop of zirconium in a toroidal reservoir. The toroidal geometry of the reservoir allows one to perform the calculation for a loop of any size and without any correction of the elastic field in its region of influence. The dependencies of the loop bias on its radius and nature are obtained for various shapes of dipole defects.

The circular prismatic dislocation loop in an interface

1979 ◽  
Vol 39 (5) ◽  
pp. 685-691 ◽  
Author(s):  
N. J. Salamon ◽  
M. Comninou
Keyword(s):  
Dislocation Loop ◽  
Prismatic Dislocation Loop

Atomistic insights into the prismatic dislocation loop on Al (1 0 0) during nanoindentation investigated by molecular dynamics

2018 ◽  
Vol 143 ◽  
pp. 384-390 ◽  
Author(s):  
Sanshan Jiao ◽  
Wenjing Tu ◽  
Peigen Zhang ◽  
Wei Zhang ◽  
Liguang Qin ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Dislocation Loop ◽  
Prismatic Dislocation Loop

The stress-driven redistribution of point defects in the vicinity of crack-like singularities

1990 ◽  
Vol 427 (1872) ◽  
pp. 1-23 ◽  
Keyword(s):  
Steady State ◽  
Stress Field ◽  
Grain Boundary ◽  
Point Defect ◽  
Slip Band ◽  
Point Defects ◽  
Elastic Interaction ◽  
Mode Ii ◽  
Fracture Of Materials ◽  
Kinetics Of

The most important term in the energy of the elastic interaction between a crack and a point defect is presented and used to estimate the kinetics of redistribution of point defects in the stress field of an isolated crack under mode II load and a slip band impinging against a grain boundary sink. Our analyses show that the point defects should migrate only to the tip of the crack, whereas they should enter both into the slip band tip and along the adjacent boundary interface. Explicit results are obtained for the concentrations, the number and flux distributions as well as the total numbers segregated in the transient depletion and the steady-state irradiation situation and serve to reinforce previous conclusions regarding the importance of such stress-driven processes in the fracture of materials.

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