The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
Exceptional fracture toughness of CrCoNi-based medium- and high-entropy alloys at 20 kelvin
Open accessAbstract
CrCoNi-based medium- and high-entropy alloys display outstanding damage tolerance, especially at cryogenic temperatures. In this study, we examined the fracture toughness values of the equiatomic CrCoNi and CrMnFeCoNi alloys at 20 kelvin (K). We found exceptionally high crack-initiation fracture toughnesses of 262 and 459 megapascal-meters ½ (MPa·m ½ ) for CrMnFeCoNi and CrCoNi, respectively; CrCoNi displayed a crack-growth toughness exceeding 540 MPa·m ½ after 2.25 millimeters of stable cracking. Crack-tip deformation structures at 20 K are quite distinct from those at higher temperatures. They involve nucleation and restricted growth of stacking faults, fine nanotwins, and transformed epsilon martensite, with coherent interfaces that can promote both arrest and transmission of dislocations to generate strength and ductility. We believe that these alloys develop fracture resistance through a progressive synergy of deformation mechanisms, dislocation glide, stacking-fault formation, nanotwinning, and phase transformation, which act in concert to prolong strain hardening that simultaneously elevates strength and ductility, leading to exceptional toughness.
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A fracture-resistant high-entropy alloy for cryogenic applications
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Self-citationMetastable high-entropy dual-phase alloys overcome the strength–ductility trade-off
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Self-citationExceptional damage-tolerance of a medium-entropy alloy CrCoNi at cryogenic temperatures
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Metadata
- Authors
- Liu, D., Yu, Q., Kabra, S., Jiang, M., Forna-Kreutzer, P., Zhang, R., Payne, M., Walsh, F., Gludovatz, B., Asta, M., Minor, A. M., George, E. P., & Ritchie, R. O.
- Venue
- Science
- Published
- 2022-12-02
- Volume
- 378
- Issue
- 6623
- Pages
- 978-983
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W4310700150
- Cited by
- 543
- References
- 42
- FWCI
- 37.15
- Type
- journal article
- Language
- en
- Open access
- green
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- Liu, D., Yu, Q., Kabra, S., Jiang, M., Forna-Kreutzer, P., Zhang, R., Payne, M., Walsh, F., Gludovatz, B., Asta, M., Minor, A. M., George, E. P., & Ritchie, R. O. (2022). Exceptional fracture toughness of CrCoNi-based medium- and high-entropy alloys at 20 kelvin. Science. https://doi.org/10.1126/science.abp8070
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