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Revealing the Geometrically Necessary Dislocation Density Evolution during Hot Compression of AA7050
Key Engineering Materials, 2022Dislocations play a critical role in metal forming processes, and accurate values of dislocation density are important in modelling these processes. However, direct determination of the dislocation density is challenging. In this study, electron backscatter diffraction is used to estimate the evolution of geometrically necessary dislocation density as ...
Shuai Jiang +6 more
semanticscholar +2 more sources
Experimental Mechanics, 2021
Optical metrology is widely used to measure materials’ deformation and mechanical properties but current fundamental research requires more precise measurement of microstructure and deformation in internal materials. Electron backscattered diffraction (EBSD) technique measures crystal orientation in individual grain and high resolution EBSD (HR-EBSD ...
C. Zhao, X. Li
semanticscholar +2 more sources
Optical metrology is widely used to measure materials’ deformation and mechanical properties but current fundamental research requires more precise measurement of microstructure and deformation in internal materials. Electron backscattered diffraction (EBSD) technique measures crystal orientation in individual grain and high resolution EBSD (HR-EBSD ...
C. Zhao, X. Li
semanticscholar +2 more sources
Metallurgical and Materials Transactions A, 2018
Measurement of geometrically necessary dislocation (GND) density using electron backscatter diffraction (EBSD) has become rather common place in modern metallurgical research. The utility of this measure as an indicator of the expected flow behavior of the material is not obvious.
A. Kundu, D. Field
semanticscholar +2 more sources
Measurement of geometrically necessary dislocation (GND) density using electron backscatter diffraction (EBSD) has become rather common place in modern metallurgical research. The utility of this measure as an indicator of the expected flow behavior of the material is not obvious.
A. Kundu, D. Field
semanticscholar +2 more sources
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2019
The difficulty of obtaining key information, such as the crystal orientation and geometrically necessary dislocation (GND) density distribution, from a large deformation region in an adiabatic shear band (ASB) has hindered further study of the ASB ...
Xin Liu +4 more
semanticscholar +3 more sources
The difficulty of obtaining key information, such as the crystal orientation and geometrically necessary dislocation (GND) density distribution, from a large deformation region in an adiabatic shear band (ASB) has hindered further study of the ASB ...
Xin Liu +4 more
semanticscholar +3 more sources
Key Engineering Materials, 2016
As components with proportional feature and tooling sizes are miniaturized, strain gradients through the cross-section increase. This causes strain gradient hardening as the density of geometrically necessary dislocations increases. This will lead to higher required forces in the process than expected.
Li Jie Wang, B. Kinsey, S. Parasiz
semanticscholar +2 more sources
As components with proportional feature and tooling sizes are miniaturized, strain gradients through the cross-section increase. This causes strain gradient hardening as the density of geometrically necessary dislocations increases. This will lead to higher required forces in the process than expected.
Li Jie Wang, B. Kinsey, S. Parasiz
semanticscholar +2 more sources
International Journal of Plasticity, 2014
Experiments and numerical simulations of various angles of wedge indenters into face-centered cubic single crystal were performed under plane strain conditions.
C. Dahlberg +3 more
semanticscholar +2 more sources
Experiments and numerical simulations of various angles of wedge indenters into face-centered cubic single crystal were performed under plane strain conditions.
C. Dahlberg +3 more
semanticscholar +2 more sources
Journal of Applied Crystallography, 2019
An implementation of smoothing splines is proposed to reduce orientation noise in electron backscatter diffraction (EBSD) data, and subsequently estimate more accurate geometrically necessary dislocation (GND) densities.
A. Seret +4 more
semanticscholar +4 more sources
An implementation of smoothing splines is proposed to reduce orientation noise in electron backscatter diffraction (EBSD) data, and subsequently estimate more accurate geometrically necessary dislocation (GND) densities.
A. Seret +4 more
semanticscholar +4 more sources
Acta Materialia, 2019
The effect of crystal orientation on fretting fatigue induced crack initiation and dislocation distribution is studied by in-situ SEM observation and electron back-scattered diffraction (EBSD) in this paper.
Qi‐Nan Han +7 more
semanticscholar +3 more sources
The effect of crystal orientation on fretting fatigue induced crack initiation and dislocation distribution is studied by in-situ SEM observation and electron back-scattered diffraction (EBSD) in this paper.
Qi‐Nan Han +7 more
semanticscholar +3 more sources
Journal of Mechanical Science and Technology, 2013
A plastic strain gradient theory incorporating the geometrically necessary dislocation density based on the low order displacement finite element method is proposed for calculation of the hardness value by Berkovich indentation. The obtained analysis results by this work are found to be in good agreement with the experimental data.
M. Park, Y. Suh
semanticscholar +2 more sources
A plastic strain gradient theory incorporating the geometrically necessary dislocation density based on the low order displacement finite element method is proposed for calculation of the hardness value by Berkovich indentation. The obtained analysis results by this work are found to be in good agreement with the experimental data.
M. Park, Y. Suh
semanticscholar +2 more sources