The DOI matches its Crossref record; 33 of the 33 references it cites were found in a registry or an index.
Shearing brittle intermetallics enhances cryogenic strength and ductility of steels
Abstract
Precipitates are crucial for crafting mechanically strong metallic materials. In this work, we report the dislocation cutting of B2 (ordered body-centered cubic) nanoprecipitates, typically considered nonshearable intermetallics, in a lightweight compositionally complex steel during cryogenic tensile loading. Shearing is enabled by the high strength level for dislocation glide within the austenitic matrix, attributed to the substantial strengthening from subnanoscale local chemical ordering zones and the pronounced solid solution strengthening from the multiprincipal elements in the matrix. This mechanism not only harnesses the intense strengthening and strain hardening provided by otherwise impenetrable brittle nanoprecipitates but also introduces ductility through their sequential shearing with ongoing deformation. Our steel thus showcases ultrahigh cryogenic tensile strength up to 2 gigapascal at a remarkable tensile elongation of 34%. This study reveals a new strategy for designing high-performance structural materials.
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A fracture-resistant high-entropy alloy for cryogenic applications
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Self-citationMechanical behavior of high-entropy alloys
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Metadata
- Authors
- Wang, F., Song, M., Elkot, M. N., Yao, N., Sun, B., Song, M., Wang, Z., & Raabe, D.
- Venue
- Science
- Published
- 2024-05-31
- Volume
- 384
- Issue
- 6699
- Pages
- 1017-1022
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W4399168002
- Cited by
- 253
- References
- 33
- FWCI
- 34.08
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, F., Song, M., Elkot, M. N., Yao, N., Sun, B., Song, M., Wang, Z., & Raabe, D. (2024). Shearing brittle intermetallics enhances cryogenic strength and ductility of steels. Science. https://doi.org/10.1126/science.ado2919
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