TU Darmstadt / ULB / TUbiblio

Atomic-Level Processes of Shear Band Nucleation in Metallic Glasses

Şopu, D. and Stukowski, A. and Stoica, M. and Scudino, S. (2017):
Atomic-Level Processes of Shear Band Nucleation in Metallic Glasses.
In: Physical Review Letters, American Physical Society, pp. 195503(1, 119, (19), ISSN 0031-9007,
DOI: 10.1103/PhysRevLett.119.195503,
[Online-Edition: https://doi.org/10.1103/PhysRevLett.119.195503],
[Article]

Abstract

The ability to control the plastic deformation of amorphous metals is based on the capacity to influence the percolation of the shear transformation zones (STZs). Despite the recent research progress, the mechanism of STZ self-assembly has so far remained elusive. Here, we identify the structural perturbation generated by an STZ in the surrounding material and show how such a perturbation triggers the activation of the neighboring STZ. The mechanism is based on the autocatalytic generation of successive strong strain and rotation fields, leading to STZ percolation and, ultimately, to the formation of a shear band.

Item Type: Article
Erschienen: 2017
Creators: Şopu, D. and Stukowski, A. and Stoica, M. and Scudino, S.
Title: Atomic-Level Processes of Shear Band Nucleation in Metallic Glasses
Language: English
Abstract:

The ability to control the plastic deformation of amorphous metals is based on the capacity to influence the percolation of the shear transformation zones (STZs). Despite the recent research progress, the mechanism of STZ self-assembly has so far remained elusive. Here, we identify the structural perturbation generated by an STZ in the surrounding material and show how such a perturbation triggers the activation of the neighboring STZ. The mechanism is based on the autocatalytic generation of successive strong strain and rotation fields, leading to STZ percolation and, ultimately, to the formation of a shear band.

Journal or Publication Title: Physical Review Letters
Volume: 119
Number: 19
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 14 Nov 2017 08:53
DOI: 10.1103/PhysRevLett.119.195503
Official URL: https://doi.org/10.1103/PhysRevLett.119.195503
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item