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Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility
Open accessAbstract
Significance: For centuries it has been a challenge to avoid strength–ductility trade-off, which is especially problematic for ultrastrong ultrafine-grained metals. Here we evade this trade-off dilemma by architecting a heterogeneous lamella structure, i.e., soft micrograined lamellae embedded in hard ultrafine-grained lamella matrix. The heterogeneous deformation of this previously unidentified structure produces significant back-stress hardening in addition to conventional dislocation hardening, rendering it higher strain hardening than coarse-grained metals. The high back-stress hardening makes the material as strong as ultrafine-grained metals and as ductile as coarse-grained metals.
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Cited by
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Zhu, Y., & Wu, X. (2023) · Progress in Materials Science · doi:10.1016/j.pmatsci.2022.101019 · Cited by 1,537
Self-citationGao, X., Lu, Y., Zhang, B., Liang, N., Wu, G., Sha, G., Liu, J., & Zhao, Y. (2017) · Acta Materialia · doi:10.1016/j.actamat.2017.07.041 · Cited by 887
Self-citationMechanical properties and deformation mechanisms of gradient nanostructured metals and alloys
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Additive manufacturing of structural materials
Liu, G., Zhang, X., Chen, X., He, Y., Cheng, L., Huo, M., Yin, J., Hao, F., Chen, S., Wang, P., et al. (2021) · Materials Science and Engineering: R: Reports · doi:10.1016/j.mser.2020.100596 · Cited by 707
Metadata
- Authors
- Wu, X., Yang, M., Yuan, F., Wu, G., Wei, Y., Huang, X., & Zhu, Y.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2015-11-09
- Volume
- 112
- Issue
- 47
- Pages
- 14501-14505
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2150567030
- Cited by
- 2,017
- References
- 0
- FWCI
- 25.05
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Wu, X., Yang, M., Yuan, F., Wu, G., Wei, Y., Huang, X., & Zhu, Y. (2015). Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1517193112
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