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Volume 16
Issue 23
10.3390/ma16237444
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Review

Structural Relaxation, Rejuvenation and Plasticity of Metallic Glasses: Microscopic Details from Anelastic Relaxation Spectra

by
Michael Atzmon
1,2,*,
Jong Doo Ju
3 and
Tianjiao Lei
4
1
Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA
2
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
3
Materials Engineering, Testing and Standards (METS), Central Laboratory, Ford Motor Company, Dearborn, MI 48120, USA
4
Department of Metallurgy and Materials Engineering, University of Alabama, Tuscaloosa, AL 35487, USA
*
Author to whom correspondence should be addressed.
Materials 2023, 16(23), 7444; https://doi.org/10.3390/ma16237444
Submission received: 19 September 2023 / Revised: 11 November 2023 / Accepted: 15 November 2023 / Published: 30 November 2023
(This article belongs to the Special Issue Advances in Glass and Glass-Ceramic Materials)
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Abstract

The lack of periodicity and long-range order poses significant challenges in explaining and modeling the properties of metallic glasses. Conventional modeling of nonexponential relaxation with stretched exponents leads to inconsistencies and rarely offers information on microscopic properties. Instead, using quasi-static anelastic relaxation, we have obtained relaxation-time spectra over >10 orders of magnitude of time for several metallic glasses. The spectra enable us to examine in microscopic detail the distribution of shear transformation zones and their properties. They reveal an atomically-quantized hierarchy of shear transformation zones, providing insights into the effect of structural relaxation and rejuvenation, the origin of plasticity and the mechanisms of the alpha and beta relaxation.
Keywords: metallic glass; shear transformation zone; anelasticity; plasticity metallic glass; shear transformation zone; anelasticity; plasticity

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MDPI and ACS Style

Atzmon, M.; Ju, J.D.; Lei, T. Structural Relaxation, Rejuvenation and Plasticity of Metallic Glasses: Microscopic Details from Anelastic Relaxation Spectra. Materials 2023, 16, 7444. https://doi.org/10.3390/ma16237444

AMA Style

Atzmon M, Ju JD, Lei T. Structural Relaxation, Rejuvenation and Plasticity of Metallic Glasses: Microscopic Details from Anelastic Relaxation Spectra. Materials. 2023; 16(23):7444. https://doi.org/10.3390/ma16237444

Chicago/Turabian Style

Atzmon, Michael, Jong Doo Ju, and Tianjiao Lei. 2023. "Structural Relaxation, Rejuvenation and Plasticity of Metallic Glasses: Microscopic Details from Anelastic Relaxation Spectra" Materials 16, no. 23: 7444. https://doi.org/10.3390/ma16237444

APA Style

Atzmon, M., Ju, J. D., & Lei, T. (2023). Structural Relaxation, Rejuvenation and Plasticity of Metallic Glasses: Microscopic Details from Anelastic Relaxation Spectra. Materials, 16(23), 7444. https://doi.org/10.3390/ma16237444

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