TU Darmstadt / ULB / TUbiblio

Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses

Nandam, Sree Harsha ; Schwaiger, Ruth ; Kobler, Aaron ; Kübel, Christian ; Wang, Chaomin ; Ivanisenko, Yulia ; Hahn, Horst (2021)
Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses.
In: Journal of Materials Research, 36 (14)
doi: 10.1557/s43578-021-00285-4
Article, Bibliographie

Abstract

Strain localization during plastic deformation drastically reduces the shear band stability in metallic glasses, ultimately leading to catastrophic failure. Therefore, improving the plasticity of metallic glasses has been a long-standing goal for several decades. In this regard, nanoglass, a novel type of metallic glass, has been proposed to exhibit differences in short and medium range order at the interfacial regions, which could promote the formation of shear transformation zones. In the present work, by introducing heterogeneities at the nanoscale, both crystalline and amorphous, significant improvements in plasticity are realized in micro-compression tests. Both amorphous and crystalline dispersions resulted in smaller strain bursts during plastic deformation. The yield strength is found to increase significantly in Cu-Zr nanoglasses compared to the corresponding conventional metallic glasses. The reasons for the mechanical behavior and the importance of nanoscale dispersions to tailor the properties is discussed in detail.

Item Type: Article
Erschienen: 2021
Creators: Nandam, Sree Harsha ; Schwaiger, Ruth ; Kobler, Aaron ; Kübel, Christian ; Wang, Chaomin ; Ivanisenko, Yulia ; Hahn, Horst
Type of entry: Bibliographie
Title: Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses
Language: English
Date: 28 July 2021
Publisher: Springer Nature
Journal or Publication Title: Journal of Materials Research
Volume of the journal: 36
Issue Number: 14
DOI: 10.1557/s43578-021-00285-4
Abstract:

Strain localization during plastic deformation drastically reduces the shear band stability in metallic glasses, ultimately leading to catastrophic failure. Therefore, improving the plasticity of metallic glasses has been a long-standing goal for several decades. In this regard, nanoglass, a novel type of metallic glass, has been proposed to exhibit differences in short and medium range order at the interfacial regions, which could promote the formation of shear transformation zones. In the present work, by introducing heterogeneities at the nanoscale, both crystalline and amorphous, significant improvements in plasticity are realized in micro-compression tests. Both amorphous and crystalline dispersions resulted in smaller strain bursts during plastic deformation. The yield strength is found to increase significantly in Cu-Zr nanoglasses compared to the corresponding conventional metallic glasses. The reasons for the mechanical behavior and the importance of nanoscale dispersions to tailor the properties is discussed in detail.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > In-situ electron microscopy
Date Deposited: 12 Jun 2024 08:27
Last Modified: 12 Jun 2024 08:27
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details