DOI: 10.1073/pnas.0611097104. Interfacial plasticity governs strain rate sensitivity and ductility in nanostructured metals

Interfacial plasticity governs strain rate sensitivity and ductility in nanostructured metals

10.1073/pnas.0611097104

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Nano-twinned copper exhibits an unusual combination of ultrahigh strength and high ductility, along with increased strain-rate sensitivity. We develop a mechanistic framework for predicting the rate sensitivity and elucidating the origin of ductility in terms of the interactions of dislocations with interfaces. Using atomistic reaction pathway calculations, we show that slip transfer reactions mediated by twin boundary are the rate-controlling mechanisms of plastic flow. We attribute the relatively high ductility of nano-twinned copper to the hardening of twin boundaries as they gradually lose coherency during plastic deformation. These findings provide insights into the possible means of optimizing strength and ductility through interfacial engineering.

Bibliography

Zhu, T., Li, J., Samanta, A., Kim, H. G., & Suresh, S. (2007). Interfacial plasticity governs strain rate sensitivity and ductility in nanostructured metals. Proceedings of the National Academy of Sciences, 104(9), 3031â3036.

Authors 5

Ting Zhu (first)
Ju Li (additional)
Amit Samanta (additional)
Hyoung Gyu Kim (additional)
Subra Suresh (additional)

References 45 Referenced 534

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Dates

Type	When
Created	18 years, 6 months ago (Feb. 21, 2007, 8:51 p.m.)
Deposited	3 years, 4 months ago (April 12, 2022, 3:50 p.m.)
Indexed	5 days, 6 hours ago (Aug. 22, 2025, 12:47 a.m.)
Issued	18 years, 6 months ago (Feb. 27, 2007)
Published	18 years, 6 months ago (Feb. 27, 2007)
Published Online	18 years, 6 months ago (Feb. 27, 2007)
Published Print	18 years, 6 months ago (Feb. 27, 2007)

Funders 0

None

BibTeX

@article{Zhu_2007, title={Interfacial plasticity governs strain rate sensitivity and ductility in nanostructured metals}, volume={104}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0611097104}, DOI={10.1073/pnas.0611097104}, number={9}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Zhu, Ting and Li, Ju and Samanta, Amit and Kim, Hyoung Gyu and Suresh, Subra}, year={2007}, month=feb, pages={3031–3036} }

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