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Title: Mechanical glass transition revealed by the fracture toughness of metallic glasses

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 (T f), 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 T f-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. Furthermore, 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.

Authors:
; ; ; ORCiD logo; ; ; ; ; ; ; ; ORCiD logo; ; ORCiD logo;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1463919
Alternate Identifier(s):
OSTI ID: 1468283
Grant/Contract Number:  
SC0004889; AC02-06CH11357; SC0016179; AC05-00OR22725
Resource Type:
Journal Article: Published Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Name: Nature Communications Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Ketkaew, Jittisa, Chen, Wen, Wang, Hui, Datye, Amit, Fan, Meng, Pereira, Gabriela, Schwarz, Udo D., Liu, Ze, Yamada, Rui, Dmowski, Wojciech, Shattuck, Mark D., O’Hern, Corey S., Egami, Takeshi, Bouchbinder, Eran, and Schroers, Jan. Mechanical glass transition revealed by the fracture toughness of metallic glasses. United Kingdom: N. p., 2018. Web. doi:10.1038/s41467-018-05682-8.
Ketkaew, Jittisa, Chen, Wen, Wang, Hui, Datye, Amit, Fan, Meng, Pereira, Gabriela, Schwarz, Udo D., Liu, Ze, Yamada, Rui, Dmowski, Wojciech, Shattuck, Mark D., O’Hern, Corey S., Egami, Takeshi, Bouchbinder, Eran, & Schroers, Jan. Mechanical glass transition revealed by the fracture toughness of metallic glasses. United Kingdom. doi:10.1038/s41467-018-05682-8.
Ketkaew, Jittisa, Chen, Wen, Wang, Hui, Datye, Amit, Fan, Meng, Pereira, Gabriela, Schwarz, Udo D., Liu, Ze, Yamada, Rui, Dmowski, Wojciech, Shattuck, Mark D., O’Hern, Corey S., Egami, Takeshi, Bouchbinder, Eran, and Schroers, Jan. Thu . "Mechanical glass transition revealed by the fracture toughness of metallic glasses". United Kingdom. doi:10.1038/s41467-018-05682-8.
@article{osti_1463919,
title = {Mechanical glass transition revealed by the fracture toughness of metallic glasses},
author = {Ketkaew, Jittisa and Chen, Wen and Wang, Hui and Datye, Amit and Fan, Meng and Pereira, Gabriela and Schwarz, Udo D. and Liu, Ze and Yamada, Rui and Dmowski, Wojciech and Shattuck, Mark D. and O’Hern, Corey S. and Egami, Takeshi and Bouchbinder, Eran and Schroers, Jan},
abstractNote = {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. Furthermore, 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.},
doi = {10.1038/s41467-018-05682-8},
journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 9,
place = {United Kingdom},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1038/s41467-018-05682-8

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Cited by: 6 works
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    Works referencing / citing this record:

    Signatures of structural differences in Pt–P- and Pd–P-based bulk glass-forming liquids
    journal, July 2019