Mechanical & Materials Engineering, Department of

 

ORCID IDs

0000-0002-8445-8718

0000-0002-7397-1209

0000-0001-5130-300X

0000-0002-8380-8667

Document Type

Article

Date of this Version

2019

Citation

MATER. RES. LETT. 2019, VOL. 7, NO. 1, 33–39

Comments

© 2018 The Author(s).

Open access

https://doi.org/10.1080/21663831.2018.1552211

Abstract

Aluminum (Al) alloys have been widely used in the transportation industry. However, most highstrength Al alloys to date have limited mechanical strength, on the order of a few hundred MPa, which is much lower than the flow stress of high-strength steels. In this study, we show the fabrication of nanocrystalline Al alloys with high-density growth twins enabled by a few atomic percent of Co solute. In situ uniaxial compression tests show that the flow stress of Al–Co solid solution alloys exceeds 1.5 GPa, while good work hardening capability is maintained. This study provides a new perspective on the design of high-strength Al alloys for various applications.

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