Mechanical glass transition revealed by the fracture toughness of metallic glasses

Jittisa Ketkaew, Wen Chen, Hui Wang, Amit Datye, Meng Fan, Gabriela Pereira, Udo D. Schwarz, Ze Liu, Rui Yamada, Wojciech Dmowski, Mark D. Shattuck, Corey S. O’Hern, Takeshi Egami, Eran Bouchbinder and Jan Schroers ()
Additional contact information
Jittisa Ketkaew: Yale University
Wen Chen: Yale University
Hui Wang: University of Tennessee
Amit Datye: Yale University
Meng Fan: Yale University
Gabriela Pereira: Universidade de Itaúna
Udo D. Schwarz: Yale University
Ze Liu: Wuhan University
Rui Yamada: Tohoku University
Wojciech Dmowski: University of Tennessee
Mark D. Shattuck: Yale University
Corey S. O’Hern: Yale University
Takeshi Egami: University of Tennessee
Eran Bouchbinder: Weizmann Institute of Science
Jan Schroers: Yale University

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract The fracture toughness of glassy materials remains poorly understood. In large part, this is due to the disordered, intrinsically non-equilibrium nature of the glass structure, which challenges its theoretical description and experimental determination. We show that the notch fracture toughness of metallic glasses exhibits an abrupt toughening transition as a function of a well-controlled fictive temperature (Tf), which characterizes the average glass structure. The ordinary temperature, which has been previously associated with a ductile-to-brittle transition, is shown to play a secondary role. The observed transition is interpreted to result from a competition between the Tf-dependent plastic relaxation rate and an applied strain rate. Consequently, a similar toughening transition as a function of strain rate is predicted and demonstrated experimentally. The observed mechanical toughening transition bears strong similarities to the ordinary glass transition and explains the previously reported large scatter in fracture toughness data and ductile-to-brittle transitions.

Date: 2018
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-018-05682-8 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05682-8

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-05682-8

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().