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Simultaneous Strength-Ductility Enhancement of a Nano-Lamellar AlCoCrFeNi2.1 Eutectic High Entropy Alloy by Cryo-Rolling and Annealing
Open accessAbstract
Nano-lamellar (L1 2 + B2) AlCoCrFeNi 2.1 eutectic high entropy alloy (EHEA) was processed by cryo-rolling and annealing. The EHEA developed a novel hierarchical microstructure featured by fine lamellar regions consisting of FCC lamellae filled with ultrafine FCC grains (average size ~200–250 nm) and B2 lamellae, and coarse non-lamellar regions consisting of ultrafine FCC (average size ~200–250 nm), few coarse recrystallized FCC grains and rather coarse unrecrystallized B2 phase (~2.5 µm). This complex and hierarchical microstructure originated from differences in strain-partitioning amongst the constituent phases, affecting the driving force for recrystallization. The hierarchical microstructure of the cryo-rolled and annealed material resulted in simultaneous enhancement in strength (Yield Strength/YS: 1437 ± 26 MPa, Ultimate Tensile Strength/UTS: 1562 ± 33 MPa) and ductility (elongation to failure/e f ~ 14 ± 1%) as compared to the as-cast as well as cold-rolled and annealed materials. The present study for the first time demonstrated that cryo-deformation and annealing could be a novel microstructural design strategy for overcoming strength-ductility trade off in multiphase high entropy alloys.
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Citations
Cites
The conflicts between strength and toughness
Ritchie, R. O. (2011) · Nature Materials · doi:10.1038/nmat3115 · Cited by 3,989
Cited by
Strong yet ductile nanolamellar high-entropy alloys by additive manufacturing
Ren, J., Zhang, Y., Zhao, D., Chen, Y., Guan, S., Liu, Y., Liu, L., Peng, S., Kong, F., Poplawsky, J. D., et al. (2022) · Nature · doi:10.1038/s41586-022-04914-8 · Cited by 747
Tailoring heterogeneities in high-entropy alloys to promote strength–ductility synergy
Ma, E., & Wu, X. (2019) · Nature Communications · doi:10.1038/s41467-019-13311-1 · Cited by 621
Promising properties and future trend of eutectic high entropy alloys
Lu, Y., Dong, Y., Jiang, H., Wang, Z., Cao, Z., Guo, S., Wang, T., Li, T., & Liaw, P. K. (2020) · Scripta Materialia · doi:10.1016/j.scriptamat.2020.06.022 · Cited by 559
Self-citationA high-entropy alloy with hierarchical nanoprecipitates and ultrahigh strength
Fu, Z., Jiang, L., Wardini, J. L., MacDonald, B. E., Wen, H., Xiong, W., Zhang, D., Zhou, Y., Rupert, T. J., Chen, W., et al. (2018) · Science Advances · doi:10.1126/sciadv.aat8712 · Cited by 406
Metadata
- Authors
- Bhattacharjee, T., Wani, I. S., Sheikh, S., Clark, I. T., Okawa, T., Guo, S., Bhattacharjee, P. P., & Tsuji, N.
- Venue
- Scientific Reports
- Published
- 2018-02-19
- Volume
- 8
- Issue
- 1
- Pages
- 3276-3276
- ISSN
- 2045-2322 (ISSN-L)
- OpenAlex
- W2788103315
- Cited by
- 303
- References
- 1
- FWCI
- 17.59
- Type
- journal article
- Language
- en
- Open access
- gold
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- Bhattacharjee, T., Wani, I. S., Sheikh, S., Clark, I. T., Okawa, T., Guo, S., Bhattacharjee, P. P., & Tsuji, N. (2018). Simultaneous Strength-Ductility Enhancement of a Nano-Lamellar AlCoCrFeNi2.1 Eutectic High Entropy Alloy by Cryo-Rolling and Annealing. Scientific Reports. https://doi.org/10.1038/s41598-018-21385-y
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