Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass
Abstract
Abstract To date, there has not yet been a direct observation of the initiation and propagation of individual defects in metallic glasses during deformation at the nanoscale. Here, we show through a combination of in situ nanobeam electron diffraction and large-scale molecular dynamics simulations that we can directly observe changes to the local short to medium range atomic ordering during the formation of a shear band. We observe experimentally a spatially resolved reduction of order prior to shear banding due to increased strain. We compare this to molecular dynamics simulations, in which a similar reduction in local order is seen, and caused by shear transformation zone activation, providing direct experimental evidence for this proposed nucleation mechanism for shear bands in amorphous solids. Our observation serves as a link between the atomistic molecular dynamics simulation and the bulk mechanical properties, providing insight into how one could increase ductility in glassy materials.
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1619520
- Alternate Identifier(s):
- OSTI ID: 1546689
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Name: Nature Communications Journal Volume: 10 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
Pekin, Thomas C., Ding, Jun, Gammer, Christoph, Ozdol, Burak, Ophus, Colin, Asta, Mark, Ritchie, Robert O., and Minor, Andrew M. Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass. United Kingdom: N. p., 2019.
Web. doi:10.1038/s41467-019-10416-5.
Pekin, Thomas C., Ding, Jun, Gammer, Christoph, Ozdol, Burak, Ophus, Colin, Asta, Mark, Ritchie, Robert O., & Minor, Andrew M. Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass. United Kingdom. https://doi.org/10.1038/s41467-019-10416-5
Pekin, Thomas C., Ding, Jun, Gammer, Christoph, Ozdol, Burak, Ophus, Colin, Asta, Mark, Ritchie, Robert O., and Minor, Andrew M. Tue .
"Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass". United Kingdom. https://doi.org/10.1038/s41467-019-10416-5.
@article{osti_1619520,
title = {Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass},
author = {Pekin, Thomas C. and Ding, Jun and Gammer, Christoph and Ozdol, Burak and Ophus, Colin and Asta, Mark and Ritchie, Robert O. and Minor, Andrew M.},
abstractNote = {Abstract To date, there has not yet been a direct observation of the initiation and propagation of individual defects in metallic glasses during deformation at the nanoscale. Here, we show through a combination of in situ nanobeam electron diffraction and large-scale molecular dynamics simulations that we can directly observe changes to the local short to medium range atomic ordering during the formation of a shear band. We observe experimentally a spatially resolved reduction of order prior to shear banding due to increased strain. We compare this to molecular dynamics simulations, in which a similar reduction in local order is seen, and caused by shear transformation zone activation, providing direct experimental evidence for this proposed nucleation mechanism for shear bands in amorphous solids. Our observation serves as a link between the atomistic molecular dynamics simulation and the bulk mechanical properties, providing insight into how one could increase ductility in glassy materials.},
doi = {10.1038/s41467-019-10416-5},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United Kingdom},
year = {Tue Jun 04 00:00:00 EDT 2019},
month = {Tue Jun 04 00:00:00 EDT 2019}
}
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https://doi.org/10.1038/s41467-019-10416-5
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Cited by: 31 works
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