Size effects in single-crystal metallic micro- and nanocubes

Ramathasan Thevamaran; Siddhartha Pathak; Sadegh Yazdi; Seog Jin Jeon; Olawale Lawal; Nathan Mara; Edwin L. Thomas

doi:10.1007/978-3-319-63405-0_8

Size effects in single-crystal metallic micro- and nanocubes

Ramathasan Thevamaran, Siddhartha Pathak, Sadegh Yazdi, Seog Jin Jeon, Olawale Lawal, Nathan Mara, Edwin L. Thomas

Chemical Engineering and Materials Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We study the response of single-crystal metallic micro- and nanocubes under quasistatic compression using silver as the model material. Using a seed-growth process, we synthesized the defect-free single-crystal silver cubes of near-perfect cubic geometry with their size varying from 100 nm to 2 μm. We use a nanoindentor/scanning electron microscope system to measure the stress-strain behavior and correlate it to the deformation response seen in in-situ SEM imaging. The silver cubes plastically deform through spontaneous nucleation of dislocation-slips upon reaching their yield strength. The yield strength of silver cubes exhibits strong dependence on the sample size, where the decreasing sample size results in increasing yield strength. Our studies also reveal the effects of pre-existing dislocations on the governing deformation mechanisms: the samples containing dislocations exhibit a hardening behavior with slip events of stochastic nature in contrast to the spontaneous strain-burst seen in dislocation-free sample.

Original language	English (US)
Title of host publication	Micro and Nanomechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
Editors	LaVern Starman, Jenny Hay
Publisher	Springer New York LLC
Pages	47-49
Number of pages	3
ISBN (Print)	9783319634043
DOIs	https://doi.org/10.1007/978-3-319-63405-0_8
State	Published - 2018
Event	Annual Conference and Exposition on Experimental and Applied Mechanics, 2017 - Indianapolis, United States Duration: Jun 12 2017 → Jun 15 2017

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
Volume	5
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Other

Other	Annual Conference and Exposition on Experimental and Applied Mechanics, 2017
Country/Territory	United States
City	Indianapolis
Period	6/12/17 → 6/15/17

Bibliographical note

Funding Information:
Acknowledgements We acknowledge the financial support from the George R. Brown School of Engineering of Rice University. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC52-06NA25396.

Publisher Copyright:
© 2018, The Society for Experimental Mechanics, Inc.

Keywords

Quasistatic compression
Silver microcubes
Silver nanocubes
Size-effects
Stochastic response
Strain burst

Publisher link

10.1007/978-3-319-63405-0_8

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Thevamaran, R., Pathak, S., Yazdi, S., Jeon, S. J., Lawal, O., Mara, N., & Thomas, E. L. (2018). Size effects in single-crystal metallic micro- and nanocubes. In L. Starman, & J. Hay (Eds.), Micro and Nanomechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics (pp. 47-49). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 5). Springer New York LLC. https://doi.org/10.1007/978-3-319-63405-0_8

Size effects in single-crystal metallic micro- and nanocubes. / Thevamaran, Ramathasan; Pathak, Siddhartha; Yazdi, Sadegh et al.
Micro and Nanomechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics. ed. / LaVern Starman; Jenny Hay. Springer New York LLC, 2018. p. 47-49 (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Thevamaran, R, Pathak, S, Yazdi, S, Jeon, SJ, Lawal, O, Mara, N & Thomas, EL 2018, Size effects in single-crystal metallic micro- and nanocubes. in L Starman & J Hay (eds), Micro and Nanomechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 5, Springer New York LLC, pp. 47-49, Annual Conference and Exposition on Experimental and Applied Mechanics, 2017, Indianapolis, United States, 6/12/17. https://doi.org/10.1007/978-3-319-63405-0_8

Thevamaran R, Pathak S, Yazdi S, Jeon SJ, Lawal O, Mara N et al. Size effects in single-crystal metallic micro- and nanocubes. In Starman L, Hay J, editors, Micro and Nanomechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics. Springer New York LLC. 2018. p. 47-49. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-319-63405-0_8

Thevamaran, Ramathasan ; Pathak, Siddhartha ; Yazdi, Sadegh et al. / Size effects in single-crystal metallic micro- and nanocubes. Micro and Nanomechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics. editor / LaVern Starman ; Jenny Hay. Springer New York LLC, 2018. pp. 47-49 (Conference Proceedings of the Society for Experimental Mechanics Series).

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N2 - We study the response of single-crystal metallic micro- and nanocubes under quasistatic compression using silver as the model material. Using a seed-growth process, we synthesized the defect-free single-crystal silver cubes of near-perfect cubic geometry with their size varying from 100 nm to 2 μm. We use a nanoindentor/scanning electron microscope system to measure the stress-strain behavior and correlate it to the deformation response seen in in-situ SEM imaging. The silver cubes plastically deform through spontaneous nucleation of dislocation-slips upon reaching their yield strength. The yield strength of silver cubes exhibits strong dependence on the sample size, where the decreasing sample size results in increasing yield strength. Our studies also reveal the effects of pre-existing dislocations on the governing deformation mechanisms: the samples containing dislocations exhibit a hardening behavior with slip events of stochastic nature in contrast to the spontaneous strain-burst seen in dislocation-free sample.

AB - We study the response of single-crystal metallic micro- and nanocubes under quasistatic compression using silver as the model material. Using a seed-growth process, we synthesized the defect-free single-crystal silver cubes of near-perfect cubic geometry with their size varying from 100 nm to 2 μm. We use a nanoindentor/scanning electron microscope system to measure the stress-strain behavior and correlate it to the deformation response seen in in-situ SEM imaging. The silver cubes plastically deform through spontaneous nucleation of dislocation-slips upon reaching their yield strength. The yield strength of silver cubes exhibits strong dependence on the sample size, where the decreasing sample size results in increasing yield strength. Our studies also reveal the effects of pre-existing dislocations on the governing deformation mechanisms: the samples containing dislocations exhibit a hardening behavior with slip events of stochastic nature in contrast to the spontaneous strain-burst seen in dislocation-free sample.

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ER -

Size effects in single-crystal metallic micro- and nanocubes

Abstract

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Keywords

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