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,
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Item Type: | Article |
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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 |
Place of Publication: | Darmstadt |
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: | 29 Sep 2022 05:35 |
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: | 499740866 |
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