Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass
Abstract
Deformation behavior and local strain evolutions upon loading and unloading of a bulk metallic glass (BMG) were systematically investigated by in situ digital image correlation (DIC). Distinct fluctuations and irreversible local strains were observed before the onset of macroscopic yielding. Statistical analysis shows that these fluctuations might be related to intrinsic structural heterogeneities, and that the evolution history and characteristics of local strain fields play an important role in the subsequent initiation of shear bands. Effects of sample size, pre-strain, and loading conditions were systematically analyzed in terms of the probability distributions of the resulting local strain fields. It is found that a higher degree of local shear strain heterogeneity corresponds to a more ductile stressestrain curve. Implications of these findings are discussed for the design of new materials.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Science and Technology Beijing, Beijing (China); Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Science and Technology Beijing, Beijing (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1185809
- Alternate Identifier(s):
- OSTI ID: 1249628
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Plasticity
- Additional Journal Information:
- Journal Volume: 71; Journal ID: ISSN 0749-6419
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; digital image correlation (DIC); strain heterogeneity; bulk metallic glass; inhomogeneous deformation
Citation Formats
Wu, Yuan, Bei, Hongbin, Wang, Yanli, Lu, Zhaoping, George, Easo P., and Gao, Yanfei. Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass. United States: N. p., 2015.
Web. doi:10.1016/j.ijplas.2015.05.006.
Wu, Yuan, Bei, Hongbin, Wang, Yanli, Lu, Zhaoping, George, Easo P., & Gao, Yanfei. Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass. United States. https://doi.org/10.1016/j.ijplas.2015.05.006
Wu, Yuan, Bei, Hongbin, Wang, Yanli, Lu, Zhaoping, George, Easo P., and Gao, Yanfei. Sat .
"Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass". United States. https://doi.org/10.1016/j.ijplas.2015.05.006. https://www.osti.gov/servlets/purl/1185809.
@article{osti_1185809,
title = {Deformation-induced spatiotemporal fluctuation, evolution and localization of strain fields in a bulk metallic glass},
author = {Wu, Yuan and Bei, Hongbin and Wang, Yanli and Lu, Zhaoping and George, Easo P. and Gao, Yanfei},
abstractNote = {Deformation behavior and local strain evolutions upon loading and unloading of a bulk metallic glass (BMG) were systematically investigated by in situ digital image correlation (DIC). Distinct fluctuations and irreversible local strains were observed before the onset of macroscopic yielding. Statistical analysis shows that these fluctuations might be related to intrinsic structural heterogeneities, and that the evolution history and characteristics of local strain fields play an important role in the subsequent initiation of shear bands. Effects of sample size, pre-strain, and loading conditions were systematically analyzed in terms of the probability distributions of the resulting local strain fields. It is found that a higher degree of local shear strain heterogeneity corresponds to a more ductile stressestrain curve. Implications of these findings are discussed for the design of new materials.},
doi = {10.1016/j.ijplas.2015.05.006},
journal = {International Journal of Plasticity},
number = ,
volume = 71,
place = {United States},
year = {Sat May 16 00:00:00 EDT 2015},
month = {Sat May 16 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Disorder is good for you: the influence of local disorder on strain localization and ductility of strain softening materials
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