Structural heterogeneity and plasticity of a Zr-based metallic glass modulated by high-temperature deformation

Author:

Lu Wenting1ORCID,Huang Bo1,Liao Shansi1,Liu Penghua1,Lv Hui1,Wu Jiayi1,Yi Jun1,Wang Qing1,Wang Gang1ORCID

Affiliation:

1. Institute of Materials, School of Materials Science and Engineering, Shanghai University , Shanghai 200444, China

Abstract

Metallic glasses (MGs) are of high strength but limited plasticity at room temperature (RT) due to localized shear in the intrinsically heterogeneous structure. Here, we investigate the variation of structural heterogeneity and plasticity of a Zr-based MG after high-temperature (T) tension under different stresses (σ) at 579 K (0.9Tg, where Tg is the glass transition temperature). The correlation length (ξ) of the heterogeneous structure and the average Young's modulus (E¯) increase with σ when σ is below 160 MPa; when σ exceeds 160 MPa, both ξ and E¯ decrease with σ, leading to the improvement of the plasticity. This research could be enlightening for improving the plasticity of MGs at RT through tuning their structural heterogeneity with high-T deformation.

Funder

Natural Science Foundation of Shanghai

Open Project of the Ningbo Institute of Industrial Technology of the Chinese Academy of Sciences

Publisher

AIP Publishing

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