Results 1 to 10 of about 191,305 (291)

On plastic dislocation density tensor

Results in Physics, 2019
This article attempts to clarify an issue regarding the proper definition of plastic dislocation density tensor. This study shows that the Ortiz’s and Berdichevsky’s plastic dislocation density tensors are equivalent with each other, but not with Kondo’s
Bohua Sun
doaj   +4 more sources

Dislocation Density‐Mediated Functionality in Single‐Crystal BaTiO3 [PDF]

Advanced Science
Unlike metals where dislocations carry strain singularity but no charge, dislocations in oxide ceramics are characterized by both a strain field and a local charge with a compensating charge envelope.
Fangping Zhuo, Xiandong Zhou, Felix Dietrich, Mehrzad Soleimany, Patrick Breckner, Pedro B. Groszewicz, Bai‐Xiang Xu, Gerd Buntkowsky, Jürgen Rödel   +8 more
doaj   +5 more sources

A Comparative Study of Methods for Calculating the Dislocation Density in GaN-on-Si Epitaxial Wafers [PDF]

Micromachines
A series of characterization methods involving high-resolution X-ray diffraction (HR-XRD), electron channel contrast imaging (ECCI), cathodoluminescence microscopy (CL), and atomic force microscopy (AFM) were applied to calculate the dislocation density ...
Yujie Yan, Jun Huang, Lei Pan, Biao Meng, Qiangmin Wei, Bing Yang   +5 more
doaj   +2 more sources

Intergranular fracture, grain-boundary structure, and dislocation-density interactions in FCC bicrystals [PDF]

Scientific Reports
A dislocation-density based crystalline plasticity (DCP) and nonlinear finite element (FE) analysis were used to predict, and fundamentally understand how and why fracture nucleation and propagation are related to the interrelated microstructural ...
Muh-Jang Chen, Dongyue Xie, Saryu Fensin, Abigail Hunter, Nan Li, Mohammed A. Zikry   +5 more
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Guidelines for establishing an etching procedure for dislocation density measurements on multicrystalline silicon samples [PDF]

MethodsX, 2018
With multicrystalline silicon becoming the main material used for photovoltaic applications and dislocations being one of the main material limitations to better solar cell efficiency, etch pit density measurements are gaining more importance ...
Krzysztof Adamczyk, Gaute Stokkan, Marisa Di Sabatino   +2 more
doaj   +2 more sources

Crystal Plasticity Modeling of Dislocation Density Evolution in Cellular Dislocation Structures

Metals
The complex thermal cycles during the solidification process in metal additive manufacturing (AM) lead to the formation of high-density dislocation networks, organizing into submicron-scale cellular structures.
Md Mahabubur Rohoman, Caizhi Zhou
doaj   +2 more sources

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

, 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   +9 more sources

Using SKPFM to Determine the Influence of Deformation-Induced Dislocations on the Volta Potential of Copper

Metals, 2021
The variation rule of the Volta potential on deformed copper surfaces with the dislocation density is determined in this study by using electron back-scattered diffraction (EBSD) in conjunction with scanning Kelvin probe force microscopy (SKPFM).
Yang Zhang, Wei Shi, Song Xiang
doaj   +1 more source

Analysis of dislocation density in strain-hardened alloy 690 using scanning transmission electron microscopy and its effect on the PWSCC growth behavior

Nuclear Engineering and Technology, 2021
The dislocation density in strain-hardened Alloy 690 was analyzed using scanning transmission electron microscopy (STEM) to study the relationship between the local plastic strain and susceptibility to primary water stress corrosion cracking (PWSCC) in ...
Sung-Woo Kim, Tae-Young Ahn, Dong-Jin Kim   +2 more
doaj   +1 more source

Dislocation Density of Electron Beam Powder Bed Fusion Ti–6Al–4V Alloys Determined via Time-Of-Flight Neutron Diffraction Line-Profile Analysis

Metals, 2022
Ti–6Al–4V alloys undergo a multiple phase transformation sequence during electron beam powder bed fusion (EB-PBF) additive manufacturing, forming unique dislocation substructures.
Kenta Yamanaka, Manami Mori, Yusuke Onuki, Shigeo Sato, Akihiko Chiba   +4 more
doaj   +1 more source