Journal ArticleDOI
Pile-up of screw dislocations in two-phase systems
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TLDR
In this article, a single and double pile-up of screw dislocations against an obstacle situated at a distance from the interface of a bi-metallic medium and an obstacle, respectively, was analyzed.Abstract:
In this paper, single pile-up of screw dislocations formed against an obstacle situated at a distance from the interface of a bi-metallic medium and double pile-ups of screw dislocations formed between the interface of a bi-metallic medium and an obstacle situated at a distance from the interface have been analyzed. The distribution function for the single and double pile-ups of screw dislocations, the stress field ahead of the single pile-up of screw dislocations and the force acting on the leading dislocation of the double pile-up are derived for all values of the respective shear modulus ratio, G
2/G1, such that 0<G
2/G1<∞.read more
Citations
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Subsurface crack problems in a cubic piezoelectric material
TL;DR: In this paper, a cubic piezoelectric material is considered and the surface crack problems are formulated as singular integral equations and solved by a direct numerical method, where only the parallel cracks with constant electric potential boundary condition imposed on the half-space that permeable and impermeable cracks need to be differentiated.
Journal ArticleDOI
Effect of a second phase particle on the rate of growth of fatigue cracks
TL;DR: In this paper, the effect of shear modulus, size and dispersion of second phase particles on the rate of growth of fatigue cracks in two-phase materials was determined using the kinetic theory approach.
Journal ArticleDOI
The influence of a planar interface on the energy minimization principle
K. Jagannadham,Jagdish Narayan +1 more
TL;DR: In this article, a stable dislocation configuration in a homogeneous medium with a free surface boundary satisfies two principles, namely that the total energy associated with the configuration is mininum and that the sum of the Burgers vectors of all the dislocations vanishes.
References
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Book
Theory of Dislocations
John Price Hirth,Jens Lothe +1 more
TL;DR: Dislocations in Isotropic Continua: Effects of Crystal Structure on Dislocations and Dislocation-Point-Defect Interactions at Finite temperatures.
Journal ArticleDOI
The effect of shear modulus on the stress distribution produced by a planar array of screw dislocations near a bi-metallic interface
TL;DR: Shear modulus effect on stress distribution of planar array of screw dislocations near bimetallic welded half-planes interface was studied in this paper, where the authors considered the case of a single screw.
Journal ArticleDOI
Linear dislocation arrays in heterogeneous materials
TL;DR: In this paper, a simple class of dislocation pile-ups m materials composed of soft and hard phases is examined, and it is shown that the length of the piled-up array depends linearly on the number of dislocations in the pileup, as is the case in a homogeneous material.
Journal ArticleDOI
The initiation of ductile failure by fractured carbides in an austenitic stainless steel
TL;DR: In this article, a theory describing the condition for fracture of rod-shaped chromium carbide particles in a stainless steel, first observed between 5% and 10% tensile strain, occurs as a result of the concentrated local stresses from matrix slip lines.