TU Darmstadt / ULB / TUprints

Effect of Structural Relaxation on the Indentation Size Effect and Deformation Behavior of Cu–Zr–Based Nanoglasses

Sharma, A ; Nandam, Sree Harsha ; Hahn, Horst ; Prasad, K. Eswar (2022):
Effect of Structural Relaxation on the Indentation Size Effect and Deformation Behavior of Cu–Zr–Based Nanoglasses. (Publisher's Version)
In: Frontiers in Materials, 8, Frontiers Media S.A., e-ISSN 2296-8016,
DOI: 10.26083/tuprints-00020124,
[Article]

[img]
Preview
Text
fmats-08-676764.pdf
Available under: CC BY 4.0 International - Creative Commons, Attribution.

Download (2MB) | Preview
Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Effect of Structural Relaxation on the Indentation Size Effect and Deformation Behavior of Cu–Zr–Based Nanoglasses
Language: English
Abstract:

In this work, the deformation behavior of as-prepared (AP) and structurally relaxed (SR) Cu–Zr–based nanoglasses (NGs) are investigated using nano- and micro-indentation. The NGs are subjected to structural relaxation by annealing them close to the glass transition temperature without altering their amorphous nature. The indentation load, p, vs. displacement, h, curves of SR samples are characterized by discrete displacement bursts, while the AP samples do not show any of them, suggesting that annealing has caused a local change in the amorphous structure. In both the samples, hardness (at nano- and micro-indentation) decreases with increasing p, demonstrating the indentation size effect. The micro-indentation imprints of SR NGs show evidence of shear bands at the periphery, indicating a heterogeneous plastic flow, while AP NG does not display any shear bands. Interestingly, the shear band density decreases with p, highlighting the fact that plastic strain is accommodated entirely by the shear bands in the subsurface deformation zone. The results are explained by the differences in the amorphous structure of the two NGs.

Journal or Publication Title: Frontiers in Materials
Volume of the journal: 8
Publisher: Frontiers Media S.A.
Collation: 10 Seiten
Uncontrolled Keywords: nanoglass, amorphous, indentation size effect, micro-indentation, structural relaxation, plastic deformation, nano-indentation
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 13 May 2022 13:38
Last Modified: 13 May 2022 13:39
DOI: 10.26083/tuprints-00020124
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-201249
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20124
PPN:
Export:
Actions (login required)
View Item View Item