Elasticity dominates strength and failure in metallic glasses

Liu, Z. Q.; Qu, R. T.

doi:10.1063/1.4905349

Title: Elasticity dominates strength and failure in metallic glasses

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Abstract

Two distinct deformation mechanisms of shearing and volume dilatation are quantitatively analyzed in metallic glasses (MGs) from the fundamental thermodynamics. Their competition is deduced to intrinsically dominate the strength and failure behaviors of MGs. Both the intrinsic shear and normal strengths give rise to the critical mechanical energies to activate destabilization of amorphous structures, under pure shearing and volume dilatation, respectively, and can be determined in terms of elastic constants. By adopting an ellipse failure criterion, the strength and failure behaviors of MGs can be precisely described just according to their shear modulus and Poisson's ratio without mechanical testing. Quantitative relations are established systematically and verified by experimental results. Accordingly, the real-sense non-destructive failure prediction can be achieved in various MGs. By highlighting the broad key significance of elasticity, a “composition-elasticity-property” scheme is further outlined for better understanding and controlling the mechanical properties of MGs and other glassy materials from the elastic perspectives.

Authors:: Liu, Z. Q.; Qu, R. T.

Publication Date:: Wed Jan 07 00:00:00 EST 2015

OSTI Identifier:: 22399225

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 117; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DEFORMATION; ELASTICITY; FAILURES; METALLIC GLASSES; POISSON RATIO; SHEAR; SHEAR PROPERTIES; THERMODYNAMICS

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                    Liu, Z. Q., Qu, R. T., and Zhang, Z. F., E-mail: zhfzhang@imr.ac.cn. Elasticity dominates strength and failure in metallic glasses.  United States: N. p., 2015. 
        Web.  doi:10.1063/1.4905349.

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                    Liu, Z. Q., Qu, R. T., & Zhang, Z. F., E-mail: zhfzhang@imr.ac.cn. Elasticity dominates strength and failure in metallic glasses.  United States.  https://doi.org/10.1063/1.4905349

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                    Liu, Z. Q., Qu, R. T., and Zhang, Z. F., E-mail: zhfzhang@imr.ac.cn. 2015.  
        "Elasticity dominates strength and failure in metallic glasses".  United States.  https://doi.org/10.1063/1.4905349.

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@article{osti_22399225,

  title        = {Elasticity dominates strength and failure in metallic glasses},

  author       = {Liu, Z. Q. and Qu, R. T. and Zhang, Z. F., E-mail: zhfzhang@imr.ac.cn},

  abstractNote = {Two distinct deformation mechanisms of shearing and volume dilatation are quantitatively analyzed in metallic glasses (MGs) from the fundamental thermodynamics. Their competition is deduced to intrinsically dominate the strength and failure behaviors of MGs. Both the intrinsic shear and normal strengths give rise to the critical mechanical energies to activate destabilization of amorphous structures, under pure shearing and volume dilatation, respectively, and can be determined in terms of elastic constants. By adopting an ellipse failure criterion, the strength and failure behaviors of MGs can be precisely described just according to their shear modulus and Poisson's ratio without mechanical testing. Quantitative relations are established systematically and verified by experimental results. Accordingly, the real-sense non-destructive failure prediction can be achieved in various MGs. By highlighting the broad key significance of elasticity, a “composition-elasticity-property” scheme is further outlined for better understanding and controlling the mechanical properties of MGs and other glassy materials from the elastic perspectives.},

  doi          = {10.1063/1.4905349},

  url          = {https://www.osti.gov/biblio/22399225},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 1,

  volume       = 117,

  place        = {United States},

  year         = {Wed Jan 07 00:00:00 EST 2015},

  month        = {Wed Jan 07 00:00:00 EST 2015}

}

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