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Title: Cooperative shear in bulk metallic glass composites containing metastable β-Ti dendrites
Authors: Zhang, L.
Narayan, R. L.
Sun, B. A.
Yan, T. Y.
Ramamurty, Upadrasta
Eckert, J.
Zhang, H. F.
Keywords: Science::Physics
Issue Date: 2020
Source: Zhang, L., Narayan, R. L., Sun, B. A., Yan, T. Y., Ramamurty, U., Eckert, J., & Zhang, H. F. (2020). Cooperative shear in bulk metallic glass composites containing metastable β-Ti dendrites. Physical Review Letters, 125(5), 055501-. doi:10.1103/physrevlett.125.055501
Journal: Physical Review Letters
Abstract: We report a novel plastic deformation mechanism of bulk metallic glass composites (BMGCs) containing metastable β−Ti dendrites. Plastic deformation of the BMGCs beyond the ultimate tensile strength is mediated by cooperative shear events, which comprise a shear band in the glassy matrix and a continuous ω−Ti band with a thickness of ∼10  nm in the β−Ti dendrite. The cooperative shear leads to serrated shear avalanches. The formation of narrow ω−Ti bands is caused by high local strain rates during the cooperative shear. The cooperative shear mechanism enriches the deformation mechanisms of BMGCs and also deepens the understanding of ω−Ti formation.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.125.055501
Rights: © 2020 American Physical Society (APS). All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society (APS).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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