Shear stress- and line length-dependent screw dislocation cross-slip in FCC Ni
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DOI: 10.1016/j.actamat.2016.10.005
Abstract: Abstract Screw dislocation cross-slip is important in dynamic recovery of deformed metals. A mobile screw dislocation segment can cross slip to annihilate an immobile screw dislocation segment with opposite Burgers vector, leaving excess dislocations of… read more here.
Keywords: length; slip; screw dislocation; cross slip ... See more keywords
Chemical misfit origin of solute strengthening in iron alloys
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DOI: 10.1016/j.actamat.2017.04.017
Abstract: Abstract In this first-principles study, we investigate the effect of many kinds of substitutional solute species on screw dislocation motion in bcc-Fe, dominating the strength of dilute Fe alloys. Most of the solute species show… read more here.
Keywords: solute species; chemical misfit; first principles; screw dislocation ... See more keywords
Morphological control and kinetics in three dimensions for hierarchical nanostructures growth by screw dislocations
Sign Up to like & getrecommendations! Published in 2019 at "Acta Materialia"
DOI: 10.1016/j.actamat.2018.10.007
Abstract: Abstract The precise control and in-depth understanding of the anisotropic crystal screw dislocation growth could yield further optimization of nanomaterial design and broader applications, yet the studies of rational control and kinetics for more complex… read more here.
Keywords: dislocation growth; screw dislocation; control kinetics; growth ... See more keywords
Theory of screw dislocation strengthening in random BCC alloys from dilute to “High-Entropy” alloys
Sign Up to like & getrecommendations! Published in 2020 at "Acta Materialia"
DOI: 10.1016/j.actamat.2019.10.007
Abstract: Abstract Random body-centered-cubic (BCC) “High Entropy” alloys are a new class of alloys, some having high strength and good ductility at room temperature and some having exceptional high-temperature strength. There are no theories of strengthening… read more here.
Keywords: entropy alloys; bcc; high entropy; screw dislocation ... See more keywords
Screw dislocation-carbon interaction in BCC tungsten: an ab initio study
Sign Up to like & getrecommendations! Published in 2020 at "Acta Materialia"
DOI: 10.1016/j.actamat.2020.09.014
Abstract: Abstract The interaction between carbon and screw dislocations in tungsten is investigated using ab initio calculations. The presence of carbon atoms in the vicinity of the dislocation induces a reconstruction, with the dislocation relaxing to… read more here.
Keywords: carbon; dislocation; interaction; carbon atoms ... See more keywords
Cross-kinks control screw dislocation strength in equiatomic bcc refractory alloys
Sign Up to like & getrecommendations! Published in 2021 at "Acta Materialia"
DOI: 10.1016/j.actamat.2021.116875
Abstract: Abstract Refractory multi-element alloys (RMEA) with body-centered cubic (bcc) structure have been the object of much research over the last decade due to their high potential as candidate materials for high-temperature applications. Most of these… read more here.
Keywords: control screw; bcc; screw dislocation; strength equiatomic ... See more keywords
Screw dislocation assisted spontaneous growth of single-crystalline α-Al2O3 microrods
Sign Up to like & getrecommendations! Published in 2018 at "Composites Communications"
DOI: 10.1016/j.coco.2018.08.003
Abstract: Abstract Herein we reported a simple chemical vapor deposition approach to synthesize single crystal α-Al2O3 microrods with diameters of 2–4 μm and lengths of 10–30 μm on the as-prepared SiC-Si-Al2O3 ceramics based on the screw dislocation growth.… read more here.
Keywords: dislocation; al2o3 microrods; growth; dislocation growth ... See more keywords
A continuum theory of screw dislocation equilibrium
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Engineering Science"
DOI: 10.1016/j.ijengsci.2017.03.012
Abstract: Abstract Large ensembles of screw dislocations can be described by a continuum theory. One such theory was derived from homogenization reasoning by Berdichevsky (International Journal of Engineering Science, 106 , 10-28, 2016). In the paper,… read more here.
Keywords: dislocation equilibrium; theory; continuum theory; theory screw ... See more keywords
Screw dislocation in a thin film with surface effects
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Solids and Structures"
DOI: 10.1016/j.ijsolstr.2017.01.041
Abstract: Abstract We use conformal mapping techniques to derive a semi-analytical solution to the problem of a (straight) screw dislocation embedded in a thin solid film. The surfaces of the film are assumed to incorporate surface… read more here.
Keywords: surface effects; surfaces film; dislocation; film ... See more keywords
A screw dislocation and an edge dislocation interacting with a locally rough bimaterial interface
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Solids and Structures"
DOI: 10.1016/j.ijsolstr.2021.111193
Abstract: Abstract We apply analytic continuation and conformal mapping techniques to investigate, in detail, the elastic interaction of a screw dislocation and subsequently an edge dislocation with a locally rough bimaterial interface. In the case of… read more here.
Keywords: dislocation; edge dislocation; screw dislocation; interface ... See more keywords
Atomic study on the interaction between superlattice screw dislocation and γ-Ni precipitate in γ′-Ni3Al intermetallics
Sign Up to like & getrecommendations! Published in 2018 at "Intermetallics"
DOI: 10.1016/j.intermet.2018.08.008
Abstract: Abstract Nanoscale γ precipitates in primary microscale γ′ precipitates of Ni-alloys have been recently observed in experiments. Nanoscale γ precipitates have been one of the potential factors changing the dislocation motion in primary γ′ precipitates… read more here.
Keywords: interaction superlattice; dislocation; precipitate; superlattice screw ... See more keywords