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Size of the Plastic Zone Produced by Nanoscratching
(Springer/Plenum Publishers, 2018-03)
Nanoscratching of ductile materials creates plastic zones surrounding the scratch groove. We approximate the geometry of these zones by a semicylinder with its axis oriented along the scratch direction. The radius and the ...
Low-cycle fatigue modelling supported by strain energy density-based Huffman model considering the variability of dislocation density
(2021-10-01)
The fatigue crack initiation and propagation phases have been widely studied by the scientific community. There are several models to describe low-cycle fatigue behaviour based on strain damage criteria, but the most widely ...
Comparative simulation study of the structure of the plastic zone produced by nanoindentation
(Pergamon-Elsevier Science Ltd, 2015-11)
Using molecular-dynamics simulation, we study nanoindentation in fcc (Cu and Al) and bcc (Fe and Ta) metals by a spherical indenter and investigate the size of the plastic zone generated. We find that while it does not ...
Quantification of dislocations densities in zirconium hydride by X-ray line profile analysis
(Pergamon-Elsevier Science Ltd, 2016-09-17)
Zirconium-based components in nuclear power plants are embrittled by precipitates of δ zirconium hydride, which involves a martensitic-type transformation of the hexagonal α-Zr lattice into the face-centered cubic Zr ...
The Relevant Role of Dislocations in the Martensitic Transformations in Cu–Al–Ni Single Crystals
(Springer, 2018-03-22)
The interaction between dislocations and martensitic transformations in Cu–Al–Ni alloys is shortly reviewed. Results from many researchers are critically analyzed towards a clear interpretation of the relevant role played ...
Dynamics of dislocations in a two-dimensional block copolymer system with hexagonal symmetry
(The Royal Society, 2011-01)
Block copolymer thin films have attracted considerable attention for their ability to self-assemble into nanometre-scale architectures. Recent advances in the use of block copolymer thin films as nano-lithographic masks ...
Results of standardized treatment of elbow fracture dislocations as per their injury pattern: a retrospective cohort of 89 patients
(2021)
Background: Elbow fracture dislocations represent difficult injuries to treat, with a high percentage ofcomplications. Classically, they are divided into posterolateral, posteromedial and transulnar pattern. It isessential ...
Atomistic simulation of single crystal copper nanowires under tensile stress: Influence of silver impurities in the emission of dislocations
(2014)
The transition from elastic to plastic behaviour in single crystal copper nanowires under uniaxial tensile stress at different concentrations of silver (0.0-0.5 at.% Ag) and at different temperatures (0.1, 100, and 300 K) ...
Plastic deformation of a porous bcc metal containing nanometer sized voids
(Elsevier Science, 2014-06)
Nanoporous materials, can present an outstanding range of mechanical properties. Both molecular dynamics and dislocation analysis were used to evaluate and quantify the evolution of plasticity in a porous Ta single crystal ...