Impact of cryogenic cycling on tracer diffusion in plastically deformed Pd40 Ni40 P20 bulk metallic glass

Hassanpour, A. and Vaidya, M. and Divinski, S.V. and Wilde, G. (2021) Impact of cryogenic cycling on tracer diffusion in plastically deformed Pd40 Ni40 P20 bulk metallic glass. Acta Materialia, 209 (116785). pp. 1-10. ISSN 13596454

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Abstract

The impact of thermo-mechanical treatment, in particular of room temperature high-pressure torsion (HPT), cold rolling and cryogenic thermo-cycling on shear band diffusion in a model Pd40Ni40P20 bulk metallic glass is investigated. Tracer diffusion measurements reveal the existence of fast short-circuit diffusion in deformed glasses and the diffusion enhancement was found to depend on the processing mode. The HPT processing imposes an extremely large shear deformation under quasi-hydrostatic conditions whereas cold rolling induces individual well-separated shear bands, though shear band diffusion is found to be faster after cold rolling. The cryogenic thermo-cycling enhances the shear band diffusion further and a conceptual explanation for the processes leading to kinetic rejuvenation is proposed. © 2021

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IITH Creators:
IITH CreatorsORCiD
Vaidya, Mayurhttps://orcid.org/0000-0001-7866-7348
Item Type: Article
Additional Information: acknowledge financial support by DFG via research project WI 1899/29-1.
Uncontrolled Keywords: Bulk metallic glass, Cryogenic thermal cycling, Diffusion, Plastic deformation, Shear bands
Subjects: Others > Metallurgy
Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Mrs Haseena VKKM
Date Deposited: 22 Jun 2022 09:30
Last Modified: 22 Jun 2022 09:30
URI: http://raiith.iith.ac.in/id/eprint/9345
Publisher URL: https://doi.org/10.1016/j.actamat.2021.116785
OA policy: https://v2.sherpa.ac.uk/id/publication/173
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