Huicong Chen

• McGill University

In this study, core structure dependent dislocation dynamics of a-type edge dislocation in three slip systems (basal, prismatic and pyramidal) of wurtzite GaN have been investigated using classical molecular dynamics simulations. All potential a-type edge dislocation cores in the shuffle and glide planes of the three slip systems have been identifi...

The influences of indium doping on dynamics of 〈a〉-prismatic edge dislocation along [Formula: see text] shuffle plane in wurtzite GaN have been investigated employing classical molecular dynamics (MD) simulations. The dependence of dislocation motion mode and dislocation velocity on indium doping concentration, temperature, and applied shear stress...

Twin boundary (TB) migration under the condition of the interaction between different {10–12} twin variants with a high misorientation of 60.4° was investigated by using in-situ electron backscattered diffraction technique combined with Schmid factor analysis. It was found that TBs would continue to migrate when the sides of intersecting twin bands...

The microstructure and texture evolution of an AZ31 magnesium rolled sheet during quasi-static compression at strain rates of 10⁻³ s⁻¹ has been investigated by in situ electron backscattered diffraction. The influence of initial and pre-deformed texture on the predominant deformation mechanisms during compression has been examined. It has been foun...

Electron backscattered diffraction serial image analyses on AZ31 magnesium alloy compressed along RD at different strain levels revealed that twin–twin interactions are found to correlate with mechanical hardening. Four typical twin–twin structures are investigated: (1) Parallel twins with single variant; (2) Interacting twins with single variant;...

A novel finding of this study is that localised de-twining caused by shear banding induced by uniaxial compression deformation was first found through in situ EBSD observation. The twinning deformation process showed in this paper consists of the following three steps: twinning, de-twinning and re-twinning, which needs more energy and larger load t...

The twinning and slipping modes of a rolled AZ31 magnesium alloy sheet were investigated through in situ compressive tests. A method based on scanning electron microscopy and electron backscattered diffraction measurements was used to identify activated twinning and slip systems. {10−12} tensile twins were present, but only occasionally. Contractio...

The effect of pre-compression on the tension-compression asymmetry in a h1ot-rolled Mg-3Al-1Zn alloy was investigated by Electron backscattered diffraction (EBSD) and X-ray diffraction (XRD). The tensile and compressive tests of the pre-compressed materials reveal that the tension-compression asymmetry is greatly reduced via pre-compression, which...

The effect of multidirectional pre-compression on the tension–compression asymmetry in a hot-rolled Mg–3Al–1Zn alloy is investigated in the present paper, revealing that the tension–compression asymmetry is greatly decreased via multidirectional pre-compression. The analysis of deformation behaviors through in situ EBSD observation demonstrates tha...