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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Local atomic environment and shear banding in metallic glasses

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Author(s):
Tercini, Marcela [1] ; de Aguiar Veiga, Roberto Gomes [1] ; Zuniga, Alejandro [1]
Total Authors: 3
Affiliation:
[1] Fed Univ ABC, CECS, Santo Andre, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: COMPUTATIONAL MATERIALS SCIENCE; v. 155, p. 129-135, DEC 2018.
Web of Science Citations: 5
Abstract

In this work we studied the compression behavior of a Cu45Zr45Al10 metallic glass and the relationship between the local atomic environment and shear banding using molecular dynamics. The Cu45Zr45Al10 metallic glass was first produced using the quenching technique and then deformed in compression for up to 20% at a strain rate of 10(8) s(-1). Both the compression stress-strain curve and analysis of the local shear strain show that shear banding is initiated at approximately 5%, while Voronoi analyses indicate that the most significant structural change as a function of compression strain is a decrease in the amount of Cu-centered < 0, 0, 12, 0, 0 > icosahedra. Additionally, we propose a novel quantitative tool for characterizing the local atomic environment in the metallic glass: the local density of atoms that satisfy a given condition. By using this tool for three different conditions we observed a strong spatial correlation between shear banding and the distribution of distorted Cu-centered < 0, 0, 12, 0, 0 > icosahedra. (AU)

FAPESP's process: 14/10294-4 - Multiscale computational modeling of the microstructural evolution and plasticity in metallic alloys
Grantee:Roberto Gomes de Aguiar Veiga
Support type: Research Grants - Young Investigators Grants