Work

Plastic flow of nanoglass nanowires: Influence of intrinsic heterogeneities and aspect ratio

Year: 2025

Type: article

Abstract: We present molecular dynamics simulations to reveal the deformation behavior of nanoglass nanowires under tensile loading conditions and compare the results with homogenous nanowires. We find that 2% more ductility can be obtained for nanoglass nanowires compared to homogeneous nanowires due to the presence of soft internal interfaces. In addition, there is a critical aspect ratio that marks the transition from delayed to immediate neck fracture. The plastic strain before failure is correlated with the rate of necking and the corresponding aspect ratio. For small aspect ratios (L/D < 10) a delayed occurrence of neck instability and correspondingly extended plastic strain is observed, while nanoglass nanowires with high aspect ratios (L/D > 16) exhibit accelerated necking and brittle-like deformation. Von Mises stress and internal energy calculations show that the local structure, internal stress states, and residual stresses are responsible for the improved mechanical properties in nanoglasses.

Source: Materials & Design

DOI: 10.1016/j.matdes.2025.114961

Authors: Daniel Şopu, Omar Adjaoud, Karsten Albe

Institutions: Austrian Academy of Sciences, Technische Universität Darmstadt, Erich Schmid Institute of Materials Science

Language: English

Topic: Metallic Glasses and Amorphous Alloys

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,650

Funders: Deutsche Forschungsgemeinschaft, Gauss Centre for Supercomputing, National Institute of Corrections