Atomic-scale structural heterogeneity and elastic modulus for metallic glasses

Liu, Haishun; Liu, Qingling; Su, Huadong; Yang, Weiming; Zhao, Yucheng; Huo, Juntao; Shen, Baolong

doi:10.1016/j.jnoncrysol.2015.07.016

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…The long-range disorder can be achieved by linking these ordered clusters through excessive solvent atoms. Therefore, it is accepted that these structures on different length scales will determine the physical properties from relaxation (fast or slow) to deformation (elastic or plastic) [6][7][8][9]. For instance, Ma et al [8] found that metallic glasses inherit shear/Young's modulus from their solvent atoms.…”

Section: Introductionmentioning

confidence: 99%

The correlation between weakest configurations and yield strength of Zr-based metallic glasses

Jiang

Ding

et al. 2017

Journal of Non-Crystalline Solids

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A direct relationship between the yield strength and the atomic ratio of solvent (Zr) atoms in the Zr-Cu-Al-Ni metallic glasses system is firstly uncovered. It is found that either shear modulus or yield strength decreases almost nearly with the increase in atomic ratio of Zr. The origin of this relationship is ascribed to the preferential straining of the weakest configurations, which consist of the solvent-solvent bonds and the free volume concentrated in them. It is suggested that a higher atomic ratio of Zr corresponds to a larger amount of weakest configurations, which will facilitate the activation and the accumulation of the shear transformations and finally results in the lower yield strength. This finding may provide an effective strategy for designing high-strength metallic glasses by modifying the chemical composition.

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