Results 231 to 240 of about 5,655,416 (266)

Intrinsic edge dislocations promote high-temperature strength and ductility in additively manufactured refractory high-entropy alloys. [PDF]

Nat Commun
Guo C, Jiao B, Jiang F, Chen W, Wang W, Zhang C, Zhang B, Gao H, Dong T, Sun W, Chen Z, Li H, Yang Z, Zhao S, Ding J, Ritchie RO.   +15 more
europepmc   +1 more source

Achieving High Strength and Low Yield Ratio via Direct Quenching and Aging in Cu-Precipitation-Strengthened Steel. [PDF]

Nanomaterials (Basel)
Wei X, Zhang Y, Wen Y, Yang C, Wang X, Niu J, Wang R.   +6 more
europepmc   +1 more source

Atomic-scale defect-mediated interfacial bonding in cold spray: FCC vs. BCC metal systems.

Appl Surf Sci Adv
Kardani A, Bagherifard S.
europepmc   +1 more source

Using transmission Kikuchi diffraction in a scanning electron microscope to quantify geometrically necessary dislocation density at the nanoscale

Ultramicroscopy, 2019
It is challenging to quantify the geometrically necessary dislocation (GND) density at the nanoscale using conventional electron backscatter diffraction due to its limited spatial resolution. To overcome this problem, in this study, the transmission Kikuchi diffraction (TKD) technique is used to measure lattice orientation and to calculate the ...
Jun Jiang, Hongbiao Dong, H B Dong
exaly   +7 more sources

Geometrically necessary dislocation density measurements at a grain boundary due to wedge indentation into an aluminum bicrystal

Journal of the Mechanics and Physics of Solids, 2017
Abstract An aluminum bicrystal with a symmetric tilt Σ43 (3 3 5)[1 1 0] coincident site lattice grain boundary was deformed plastically via wedge indentation under conditions that led to a plane strain deformation state. Plastic deformation is induced into both crystals and the initially straight grain boundary developed a significant curvature.
J W Kysar
exaly   +3 more sources

Resolving localized geometrically necessary dislocation densities in Al-Mg polycrystal via in situ EBSD

Acta Materialia
The distribution of geometrically necessary dislocation (GND) densities is critical to understanding the heterogeneous plastic deformation at intragranular scales in polycrystals. In this work, we performed an in situ electron backscatter diffraction (EBSD) measurement during the tensile test on a polycrystalline Al-Mg alloy.
Hongru Zhong, Qiwei Shi, Chengyi Dan
exaly   +4 more sources

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Experimental lower bounds on geometrically necessary dislocation density

International Journal of Plasticity, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
J W Kysar
exaly   +2 more sources

A dislocation density based constitutive model for crystal plasticity FEM including geometrically necessary dislocations

Acta Materialia, 2006
A dislocation density based constitutive model for face-centred cubic crystals is introduced and implemented into a crystal plasticity finite element framework. The approach assumes a homogeneous dislocation structure and tracks the dislocation evolution on each slip system.
Anxin Ma, Franz Roters, D Raabe
exaly   +3 more sources

Estimations of bulk geometrically necessary dislocation density using high resolution EBSD

Ultramicroscopy, 2013
Characterizing the content of geometrically necessary dislocations (GNDs) in crystalline materials is crucial to understanding plasticity. Electron backscatter diffraction (EBSD) effectively recovers local crystal orientation, which is used to estimate the lattice distortion, components of the Nye dislocation density tensor (α), and subsequently the ...
David Fullwood
exaly   +3 more sources

Geometrically necessary dislocation density measurements associated with different angles of indentations

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.
J W Kysar
exaly   +2 more sources