Publications by Maryam Ghazisaeidi

Modified embedded-atom method interatomic potential for Mg-Y alloys

William Curtin, Rasool Ahmad, Maryam Ghazisaeidi

2018

Solute strengthening in random alloys

William Curtin, Céline Varvenne, Maryam Ghazisaeidi

Random solid solution alloys are a broad class of materials that are used across the entire spectrum of engineering metals, whether as stand-alone materials (e.g. Al-57xxx alloys) or as the matrix in precipitate strengthening materials (e.g. Ni-based super ...

Elsevier2017

First-principles core structures of < c+a > edge and screw dislocations in Mg

William Curtin, Maryam Ghazisaeidi

The core structures of < c + a > edge and screw dislocations in Mg are computed using density functional theory (DFT). Both types dissociate into two 1/2 < c + a > partials on the second-order pyramidal planes. These DFT results are then allowed to relax w ...

Elsevier2014

Solute strengthening of twinning dislocations in Mg alloys

William Curtin, Maryam Ghazisaeidi

Solute strengthening of twin dislocation motion along an existing twin boundary in Mg–X (X = Al, Zn) is investigated using a new Labusch-type weak pinning model. First, the View the MathML source(101¯2) twinning dislocation structure is computed using firs ...

Elsevier2014

A New Mechanism for Twin Growth in Mg Alloys

William Curtin, Aitor Luque Gomez, Maryam Ghazisaeidi

Twinning is an important deformation mode in lightweight Mg alloys, but the mechanisms of nucleation and growth of twins and their interactions with solutes remain largely unresolved. Here, a new model for thermally-activated, stress-driven growth of twin ...

Elsevier2014

Analysis of dissociation of < c > and < c+a > dislocations to nucleate (1 0 -1 2) twins in Mg

William Curtin, Maryam Ghazisaeidi

A mechanism for (1 0 (1) over bar 2) twin nucleation in Mg is studied in which edge < c > and mixed < c + a > lattice dislocations dissociate into a stable twin, having at least the minimum 6-layer thickness formed by three glissile twinning dislocations, ...

Institute of Physics2013

Deformation modes in magnesium (0001) and (0 1 -1 1) single crystals: simulations versus experiments

William Curtin, Aitor Luque Gomez, Maryam Ghazisaeidi

Magnesium is an excellent candidate as lightweight structural material, but has strong plastic anisotropy, and the activation of, operation of, and competition between different slip and twinning systems remain active areas of research. Here, the nucleatio ...

Institute of Physics2013