Results 21 to 30 of about 192,787 (292)

Stress-free states of continuum dislocation fields: Rotations, grain boundaries, and the Nye dislocation density tensor

, 2007
We derive general relations between grain boundaries, rotational deformations, and stress-free states for the mesoscale continuum Nye dislocation density tensor. Dislocations generally are associated with long-range stress fields.
A. M. Kosevich, D. A. Hughes, D. Kuhlmann-Wilsdorf, E. Kröner, E. Kröner, G. B. Arfken, J. D. Eshelby, J. P. Sethna, James P. Sethna, M. C. Miguel, Surachate Limkumnerd, T. Mura, W. T. Read   +12 more
core   +4 more sources

Phase-field simulation of nano-α′ precipitates under irradiation and dislocations

Journal of Materials Research and Technology, 2023
This is the first investigation on the micromorphology and kinetics evolution of Cr-rich α′ precipitates under Cr composition, irradiation and dislocation with the three-dimensional phase-field simulation.
Wenkui Yang, Xinan Jiang, Xiaolin Tian, Hua Hou, Yuhong Zhao   +4 more
doaj   +1 more source

Dislocation density-based plasticity model from massive discrete dislocation dynamics database

Journal of the Mechanics and Physics of Solids, 2020
We present a dislocation density-based strain hardening model for single crystal copper through a systematic coarse-graining analysis of more than 200 discrete dislocation dynamics (DDD) simulations of plastic deformation under uniaxial tension. The proposed constitutive model has two components: a generalized Taylor relation connecting resolved shear ...
Akhondzadeh, Sh., Sills, Ryan B., Bertin, Nicolas, Cai, Wei   +3 more
openaire   +3 more sources

Microstructure versus size: nano/microscale deformation of solute-strengthening Al alloys via pillar compression tests

Materials Research Letters, 2019
Effect of solutes, crystal orientation, sample’s size, and dislocation density on the nano/microscale deformation of solute-strengthening Al alloys has been investigated via pillar compression tests.
Shaohua Yan, Haiyang Zhou, Qing H. Qin
doaj   +1 more source

Relationship between Dislocation Density and Oxygen Concentration in Silicon Crystals during Directional Solidification

Crystals, 2018
This paper reports the relationship between oxygen concentration and dislocation multiplication in silicon crystals during directional solidification using numerical analysis. Based on the Alexander–Haasen–Sumino model, this analysis involved
Tomoro Ide, Hirofumi Harada, Yoshiji Miyamura, Masato Imai, Satoshi Nakano, Koichi Kakimoto   +5 more
doaj   +1 more source

Microstructural modifications in tungsten induced by high flux plasma exposure : TEM examination [PDF]

, 2016
We have performed microstructural characterization using transmission electron microscopy (TEM) techniques to reveal nanometric features in the sub-surface region of tungsten samples exposed to high flux, low energy deuterium plasma.
Bakaeva, Anastasiia, De Temmerman, G, Dubinko, Andrii, Hernandez-Mayoral, M, Noterdaeme, Jean-Marie, Terentyev, D   +5 more
core   +1 more source

In-situ TEM study of loop evolution in FeCrAl alloy under Fe+ irradiation: Effects of temperatures, dislocations and precipitates

Nuclear Analysis, 2022
Fe13.5Cr4.7Al alloy was irradiated in-situ with 400 keV Fe+ in TEM at RT and 748 K. The evolution of dislocation loops under the influence of temperatures, irradiation dose, dislocation lines and precipitates were characterized in detail.
Kefei Pei, Guang Ran, Yipeng Li, Ziqi Cao, Dewang Cui, Ruiqian Zhang, Gang Yang   +6 more
doaj   +1 more source

Influence of dislocation density of nickel on dissolution kinetics in acidic chloride electrolyte

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2014
An influence of dislocation density of nickel’s anode on the density of anode current and the homogeneity of anode's dissolution along the surface in the acidic chloride electrolyte was studied. To create the dislocation density of about 109 cm
Alexey D Vasilyev
doaj   +1 more source

Melting as a String-Mediated Phase Transition

, 2000
We present a theory of the melting of elemental solids as a dislocation-mediated phase transition. We model dislocations near melt as non-interacting closed strings on a lattice.
A. Ookawa, A.Z. Patashinskii, A.Z. Patashinskii, C. Giannessi, C. Mott, D. Kuhlmann-Wilsdorf, D. R. Nelson, D.A. Lowe, D.R. Nelson, D.R. Nelson, Dean L. Preston, E. Copeland, E. Copeland, E. Copeland, F.W. Wiegel, G.F. Sarafanov, J. Emsley, J. Magueijo, J.M. Kosterlitz, J.P. Hirth, J.P. Poirier, J.P. Poirier, K.J. Strandburg, Leonid Burakovsky, M. Siol, M.B. Green, M.W. Guinan, N.D. Mermin, N.K. Gilra, N.K. Kultanov, N.K. Kultanov, P. Salomonson, P. Salomonson, R. Brandenberger, R.K. Crawford, R.M.J. Cotterill, R.M.J. Cotterill, R.M.J. Cotterill, R.M.J. Cotterill, Richard R. Silbar, S. Mizushima, S.F. Edwards, S.P. Obukhov, T. Ninomiya, T. Vachaspati, T. Yamamoto, T.W.B. Kibble, V.S. Vorob’ev, W. Janke, W. Shockley, W.L. Bragg   +50 more
core   +2 more sources

Strengthening of AA5754 aluminum alloy by DRECE process followed by annealing response investigation [PDF]

, 2020
In this study, a dual rolls equal channel extrusion (DRECE) process has been applied for improving the mechanical properties of the 5754 alloy. Supplementary experiments involving metallography, electron backscattered diffraction (EBSD), and XRD tests ...
Benedyk, Marcin, Donič, Tibor, Gołombek, Klaudiusz, Hilšer, Ondřej, Nuckowski, Paweł M., Rusz, Stanislav, Snopiński, Przemysław, Tański, Tomasz   +7 more
core   +1 more source