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Showing 1–6 of 6 results
Advanced filters: Author: Xilei Bian Clear advanced filters

  • A universal design strategy for nanograined metals aimed at utilizing oxygen nanoclustering to achieve the highly desired combination of high strength and large deformability that evades inverse Hall-Petch softening.

    • Xiaolong Yu
    • Xilei Bian
    • Gang Wang
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • In this work, by involving high-energy scanning X-ray diffraction strain mapping, we identify and distinguish between structural and elastic heterogeneity in the extremely rejuvenated metallic glasses under triaxial compression. Microindentation hardness hints at an unsymmetrical hardening/softening picture and further reveals the complementary effects of stress and structure modulation. Our results suggest that simultaneous stress and structural modulation can be used to enhance rejuvenation beyond the limits known to date, and may therefore aid in the design of MGs with enhanced ductility and strain-hardening capability.

    • Daniel Şopu
    • Florian Spieckermann
    • Jürgen Eckert
    ResearchOpen Access
    NPG Asia Materials
    Volume: 15, P: 1-9

  • Understanding the correlation between atomic-scale structural/elastic fluctuations and local plastic rearrangements (shear transformation zone (STZ)) is essential to the widespread use of metallic glasses (MGs). We report a strategy to control the local stress state and enhance the shear stability of MGs. The enhanced degree of structural/elastic heterogeneities relates to the increased nonaffine thermal strain of the short- and medium-range order. We demonstrate that variations in the stress field around STZ affect their dynamics and percolation process, the progressive formation of shear bands, and, consequently, the macroscopic deformability of MGs. This work paves a new way for designing ductile MGs.

    • Xilei Bian
    • Daniel Şopu
    • Jürgen Eckert
    ResearchOpen Access
    NPG Asia Materials
    Volume: 12, P: 1-10

  • In an inter-laboratory study, the authors compare the accuracy and performance of three optical density calibration protocols (colloidal silica, serial dilution of silica microspheres, and colony-forming unit (CFU) assay). They demonstrate that serial dilution of silica microspheres is the best of these tested protocols, allowing precise and robust calibration that is easily assessed for quality control and can also evaluate the effective linear range of an instrument.

    • Jacob Beal
    • Natalie G. Farny
    • Jiajie Zhou
    ResearchOpen Access
    Communications Biology
    Volume: 3, P: 1-29