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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:
 [1];  [1];  [2]; ORCiD logo [1];  [1];  [3];  [1];  [4];  [5];  [2];  [6]; ORCiD logo [1];  [7]; ORCiD logo [8];  [1]
  1. Yale Univ., New Haven, CT (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. de Itauna, Minas Gerais (Brazil)
  4. Wuhan Univ., Wuhan (China)
  5. Tohoku Univ., Sendai (Japan)
  6. Yale Univ., New Haven, CT (United States); City College of the City Univ. of New York, New York, NY (United States)
  7. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Weizmann Institute of Science, Rehovot (Israel)
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) (SC-22)
OSTI Identifier:
1463919
Alternate Identifier(s):
OSTI ID: 1468283
Grant/Contract Number:  
AC05-00OR22725; SC0004889; AC02-06CH11357; SC0016179
Resource Type:
Journal Article: Published Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
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 States: 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 States. 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 States. 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 States},
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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