Impact of severe plastic deformation on the relaxation of glassy and supercooled liquid states of amorphous Pd40Ni40P20

Hassanpour Afrouz, Hilke Sven, Rösner Harald, Divinski Sergiy V, Wilde Gerhard

Research article (journal) | Peer reviewed

Abstract

The impact of severe plastic deformation by high-pressure torsion on the relaxation of the glassy and supercooled liquid states of Pd40Ni40P20 was investigated using a combination of differential scanning calorimetry, low-temperature heat capacity, and fluctuation electronmicroscopy. The changes in the calorimetric signals due to deformation and subsequent heat treatments were analyzed and a correlationbetween deformation (rejuvenation) and annealing (relaxation) was found in relation to medium-range order (MRO). Moreover, acoupling between the occurrence of an exothermic peak in the supercooled liquid state and specific changes in the MRO types were identified.These findings are comprehended in a potential energy landscape scheme offering a new approach for MRO engineering of glasses.

Details about the publication

Journal: Journal of Applied Physics

Volume: 128

Issue: 155107

Page range: 1-9

Status: Published

Release year: 2020 (19/10/2020)

Language in which the publication is written: English

DOI: 10.1063/5.0026950

Link to the full text: https://aip.scitation.org/doi/10.1063/5.0026950

Keywords: bulk metallic glasses; amorphous solids; calorimetry; low-temperature heat capacity; transmission electron microscopy

Authors from the University of Münster

Divinskyi, Sergii	Professorship of Materials Physics (Prof. Wilde)
Hassanpour Shahkhali, Afrouz	Professorship of Materials Physics (Prof. Wilde)
Hilke, Sven	Professorship of Materials Physics (Prof. Wilde)
Rösner, Harald	Professorship of Materials Physics (Prof. Wilde)
Wilde, Gerhard	Professorship of Materials Physics (Prof. Wilde)

Projects the publication originates from

Coupling of irreversible plastic rearrangements and heterogeneity of the local structure during deformation of metallic glasses

Duration: 01/03/2017 - 28/02/2020

Funded by: DFG - Individual Grants Programme

Type of project: Individual project

Distinctions received for the publication

Best Poster Award - Nanoscale Poster Prize
Awarded by: 26th International Symposium on Metastable, Amorphous and Nanostructured Materials, Dr. Sam Keltie (Executive Editor)
Award given to: Hilke, Sven
Announced at: 12/07/2019 | Date of awarding: 12/07/2019
Type of distinction: Best publication award

Doctorates the publication originates from

Fluctuation electron microscopy on complex and disordered structures: comparison of experiment and simulation
Candidate: Hilke, Sven | Supervisors: Wilde, Gerhard; Peterlechner, Martin
Period of time: 02/11/2016 - 28/04/2020
Doctoral examination procedure finished at: Doctoral examination procedure at University of Münster