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The Peac Institute of Multiscale Sciences (PIMS, Chinese: 顶峰多尺度科学研究所) is a research and education institute with focus on understanding materials properties at multiple temporal and spatial scales, in particular at submicron and subnanosecond scales. The subject areas span over materials science, mechanics, condensed matter and plasma physics, chemistry, optics including THz and X-ray sciences. PIMS is located at Jiuli Campus, Southwest Jiaotong University, in downtown Chengdu.

    In situ synchrotron x-ray imaging and diffraction are used to investigate anisotropic deformation of an extruded magnesium alloy AZ31 under uniaxial compression along two different directions, with the loading axis (LA) either parallel or perpendicular to the extrusion direction (ED), referred to as LA||ED and LA⊥ED, respectively. Multiscale measurements including stressestrain curves (macroscale), x-ray digital image correlation (mesoscale), and diffraction (microscale) are obtained simultaneously. The rapid increase in strain hardening rate for the LA||ED loading is attributed to marked {1012} extension twinning and subsequent homogenization of deformation, while dislocation motion leads to inhomogeneous deformation and a decrease in strain hardening rate.

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