Publications associées à Burgers vector

Theory of double-kink nucleation in dilute BCC alloys

Yielding in pure BCC metals and dilute substitutional alloys occurs by double-kink nucleation and propagation along screw dislocations. At low temperatures, the yield stress is controlled by double-kink nucleation. Here, an analytical statistical model is ...

PERGAMON-ELSEVIER SCIENCE LTD2020

Analysis of double cross-slip of pyramidal I < c plus a > screw dislocations and implications for ductility in Mg alloys

William Curtin, Zhaoxuan Wu, Rasool Ahmad

Solute accelerated cross-slip of pyramidal < c + a > screw dislocations has recently been recognized as a crucial mechanism in enhancing the ductility of solid-solution Mg alloys. In pure Mg, cross-slip is ineffective owing to the energy difference between ...

PERGAMON-ELSEVIER SCIENCE LTD2020

Mechanistic origin of high strength in refractory BCC high entropy alloys up to 1900K

William Curtin, Francesco Maresca

The body centered cubic (BCC) high entropy alloys (HEAs) MoNbTaW and MoNbTaVW show exceptional strength retention up to 1900K. The mechanistic origin of the retained strength is unknown yet is crucial for finding the best alloys across the immense space of ...

PERGAMON-ELSEVIER SCIENCE LTD2020

Theory of screw dislocation strengthening in random BCC alloys from dilute to "High-Entropy" alloys

William Curtin, Francesco Maresca

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 of screw disloc ...

PERGAMON-ELSEVIER SCIENCE LTD2020

Effect of solute-solute interactions on strengthening of random alloys from dilute to high entropy alloys

William Curtin, Shankha Nag

The yield strength of random metal alloys, i.e. alloys with random occupation of the crystalline lattice sites by the elemental constituent atoms all considered as solutes, is primarily understood as controlled by solute/dislocation interactions. Solute-so ...

PERGAMON-ELSEVIER SCIENCE LTD2020

The thermally activated distortion with amplification effect and related variant selection in red gold alloys

Roland Logé, Cyril Cayron, Margaux Nathalie Dominique Larcher

Variant selection during the A1→L10 transformation in a polycrystalline red gold alloy close to equiatomic Au-Cu composition has been extensively studied by Electron Backscatter Diffraction (EBSD) in our previous work. The use of a mathematical description ...

2020

Finite-size corrections of defect energy levels involving ionic polarization

Alfredo Pasquarello, Stefano Falletta, Julia Anna Wiktor

We develop a scheme for finite-size corrections of vertical transition energies and single-particle energy levels involving defect states with built-in ionic polarization in supercell calculations. The method accounts on an equal footing for the screening ...

2020

Structure and properties of edge dislocations in BiFeO3

Cécile Hébert, Daniele Passerone, Rolf Erni, Piyush Agrawal

Edge dislocations are frequently found in epitaxial BiFeO3 multiferroic thin films and are expected to exhibit distinctive and localized magnetoelectric properties. However, an exhaustive characterization of these dislocations at the atomic level has to da ...

AMER PHYSICAL SOC2019

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Burgers vector

Theory of double-kink nucleation in dilute BCC alloys

Analysis of double cross-slip of pyramidal I < c plus a > screw dislocations and implications for ductility in Mg alloys

Mechanistic origin of high strength in refractory BCC high entropy alloys up to 1900K

Theory of screw dislocation strengthening in random BCC alloys from dilute to "High-Entropy" alloys

Effect of solute-solute interactions on strengthening of random alloys from dilute to high entropy alloys

The thermally activated distortion with amplification effect and related variant selection in red gold alloys

Concurrent multiscale modeling and theory of solute-strengthening for dilute and complex concentrated alloys

Flexopiezoelectricity at ferroelastic domain walls in WO3 films

Finite-size corrections of defect energy levels involving ionic polarization

Structure and properties of edge dislocations in BiFeO3

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Chattez avec Graph Search

Analysis of double cross-slip of pyramidal I < c plus a > screw dislocations and implications for ductility in Mg alloys

Structure and properties of edge dislocations in BiFeO3

Theory of double-kink nucleation in dilute BCC alloys

Theory of screw dislocation strengthening in random BCC alloys from dilute to "High-Entropy" alloys

Mechanistic origin of high strength in refractory BCC high entropy alloys up to 1900K

Concurrent multiscale modeling and theory of solute-strengthening for dilute and complex concentrated alloys

Flexopiezoelectricity at ferroelastic domain walls in WO3 films

Finite-size corrections of defect energy levels involving ionic polarization

The thermally activated distortion with amplification effect and related variant selection in red gold alloys

Effect of solute-solute interactions on strengthening of random alloys from dilute to high entropy alloys