Capture Deformation Twinning in Mg during Shock Compression with Ultrafast Synchrotron X-Ray Diffraction

Strength of magnesium at high pressures and strain rates

“…Chen et al [31] showed that when the shock compression applied along 〈101 ̅ 0〉, the crystal reorients with the new c-axis at 86.3 0 with the old c-axis. This new c-axis was nearly parallel to the loading axis as shown in Fig.…”

DATAD: a Python-based X-ray diffraction simulation code for arbitrary texture and arbitrary deformation

“…In experiments, a textured specimen can be subjected to nonhydrostatic strain, the detection geometry can be arbitrary, and the detector can be planar or cylindrical. For instance, ultrafast XRD measurements have been routinely conducted on a textured metallic specimen under nonhydrostatic compression via laser (Rygg et al, 2012), split Hopkinson bar (Lu et al, 2016(Lu et al, , 2017 and gas-gun-induced shock waves (Fan et al, 2016;Chen et al, 2019), and cylindrical detectors or other nonplanar detectors have been used in XRD measurements with laser-induced plasma emission (Rygg et al, 2020). Simulating the corresponding XRD patterns is extremely useful for such complicated experiments.…”

Molecular dynamic simulations of plasticity and phase transition in Mg polycrystalline under shock compression

“…1,2) Recently, some experiments have been carried out to investigate the deformation mechanism of Mg under extreme strain conditions. [3][4][5][6][7][8][9][10][11][12][13] The 〈c + a〉 dislocations could accommodate considerable plasticity through gliding on pyramidal planes. 11,12) Liu et al 11) also found that small crystal size in Mg brought high stress leading to high strength and superior plasticity using in situ transmission electron microscope mechanical testing.…”

“…However, recent experiments illustrated twinning did not happen in compression in the c-axis of Mg single crystal, but it was observed during stress release following compression. [3][4][5]10) Extension twinning arose upon compression along 〈10-10〉 HCP 3,5) and 〈−12-10〉 HCP . 3,[6][7][8]13) For example, Chen et al 3) demonstrated that the formation of twins depended on the loading direction and the resolved shear stress in shockcompressed Mg with in situ, ultrafast synchrotron X-ray diffraction.…”

“…[3][4][5]10) Extension twinning arose upon compression along 〈10-10〉 HCP 3,5) and 〈−12-10〉 HCP . 3,[6][7][8]13) For example, Chen et al 3) demonstrated that the formation of twins depended on the loading direction and the resolved shear stress in shockcompressed Mg with in situ, ultrafast synchrotron X-ray diffraction. In short, massive studies have focused on the plasticity in Mg under extreme conditions.…”