The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.
Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy
Open accessAbstract
Combinations of high strength and ductility are hard to attain in metals. Exceptions include materials exhibiting twinning-induced plasticity. To understand how the strength-ductility trade-off can be defeated, we apply in situ, and aberration-corrected scanning, transmission electron microscopy to examine deformation mechanisms in the medium-entropy alloy CrCoNi that exhibits one of the highest combinations of strength, ductility and toughness on record. Ab initio modelling suggests that it has negative stacking-fault energy at 0K and high propensity for twinning. With deformation we find that a three-dimensional (3D) hierarchical twin network forms from the activation of three twinning systems. This serves a dual function: conventional twin-boundary (TB) strengthening from blockage of dislocations impinging on TBs, coupled with the 3D twin network which offers pathways for dislocation glide along, and cross-slip between, intersecting TB-matrix interfaces. The stable twin architecture is not disrupted by interfacial dislocation glide, serving as a continuous source of strength, ductility and toughness.
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Metadata
- Authors
- Zhang, Z., Sheng, H., Wang, Z., Gludovatz, B., Zhang, Z., George, E. P., Yu, Q., Mao, S. X., & Ritchie, R. O.
- Venue
- Nature Communications
- Published
- 2017-02-20
- Volume
- 8
- Issue
- 1
- Pages
- 14390-14390
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2590213398
- Cited by
- 664
- References
- 38
- FWCI
- 35.87
- Type
- journal article
- Language
- en
- Open access
- gold
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- Zhang, Z., Sheng, H., Wang, Z., Gludovatz, B., Zhang, Z., George, E. P., Yu, Q., Mao, S. X., & Ritchie, R. O. (2017). Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy. Nature Communications. https://doi.org/10.1038/ncomms14390
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