Microstructural evolution of nanotwinned Al-Zr alloy with significant 9R phase

N. A. Richter; Y. F. Zhang; D. Y. Xie; R. Su; Q. Li; S. Xue; T. Niu; J. Wang; H. Wang; X. Zhang

doi:10.1080/21663831.2020.1840451

Microstructural evolution of nanotwinned Al-Zr alloy with significant 9R phase

N. A. Richter, Y. F. Zhang, D. Y. Xie, R. Su, Q. Li, S. Xue, T. Niu, J. Wang, H. Wang, X. Zhang

Alloy Behavior & Design

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Aluminum (Al) alloys have a multitude of applications, notably in the automotive, aerospace and coating industries, yet they exhibit significantly lower mechanical strength than conventional steels. Nanotwins drastically improve mechanical strength while retaining ductility. However, the high SFE of Al largely prevents twinning. Here, we synthesize Al-Zr alloy films containing an abundance of incoherent twin boundaries and 9R phases. These alloys exhibit an extended solid solubility of Zr, retaining a columnar nanotwinned structure across all compositions. These films reach a hardness up to 4.2 GPa with 10 at% Zr and demonstrate the capacity for producing strong Al alloys with nanotwins.

Original language	English
Pages (from-to)	91-98
Number of pages	8
Journal	Materials Research Letters
Volume	9
Issue number	2
DOIs	https://doi.org/10.1080/21663831.2020.1840451
State	Published - Feb 2021

Funding

This project is primarily funded by DoE-BES (Basic Energy Sciences) under grant number DE-SC0016337. The ASTAR crystal orientation system in TEM microscope is supported by ONR-DURIP award N00014-17-1-2921. Access to the Microscopy Facilities at Purdue University and Center for Integrated Nanotechnologies (managed by Los Alamos National Laboratory) are also acknowledged. Atomistic simulations were completed utilizing the Holland Computing Center of the University of Nebraska, which receives support from the Nebraska Research Initiative. This project is primarily funded by DoE-BES (Basic Energy Sciences) [grant number DE-SC0016337]. The ASTAR crystal orientation system in TEM microscope is supported by ONR-DURIP?award N00014-20-1-2659. This project is primarily funded by DoE-BES (Basic Energy Sciences) under grant number DE-SC0016337. The ASTAR crystal orientation system in TEM microscope is supported by ONR-DURIP award N00014-17-1-2921. Access to the Microscopy Facilities at Purdue University and Center for Integrated Nanotechnologies (managed by Los Alamos National Laboratory) are also acknowledged. Atomistic simulations were completed utilizing the Holland Computing Center of the University of Nebraska, which receives support from the Nebraska Research Initiative.

Keywords

9R phase
Nanotwinned Al
magnetron sputtering
stacking fault energy

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10.1080/21663831.2020.1840451

Cite this

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abstract = "Aluminum (Al) alloys have a multitude of applications, notably in the automotive, aerospace and coating industries, yet they exhibit significantly lower mechanical strength than conventional steels. Nanotwins drastically improve mechanical strength while retaining ductility. However, the high SFE of Al largely prevents twinning. Here, we synthesize Al-Zr alloy films containing an abundance of incoherent twin boundaries and 9R phases. These alloys exhibit an extended solid solubility of Zr, retaining a columnar nanotwinned structure across all compositions. These films reach a hardness up to 4.2 GPa with 10 at% Zr and demonstrate the capacity for producing strong Al alloys with nanotwins.",

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AU - Richter, N. A.

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AU - Xie, D. Y.

AU - Su, R.

AU - Li, Q.

AU - Xue, S.

AU - Niu, T.

AU - Wang, J.

AU - Wang, H.

AU - Zhang, X.

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AB - Aluminum (Al) alloys have a multitude of applications, notably in the automotive, aerospace and coating industries, yet they exhibit significantly lower mechanical strength than conventional steels. Nanotwins drastically improve mechanical strength while retaining ductility. However, the high SFE of Al largely prevents twinning. Here, we synthesize Al-Zr alloy films containing an abundance of incoherent twin boundaries and 9R phases. These alloys exhibit an extended solid solubility of Zr, retaining a columnar nanotwinned structure across all compositions. These films reach a hardness up to 4.2 GPa with 10 at% Zr and demonstrate the capacity for producing strong Al alloys with nanotwins.

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Microstructural evolution of nanotwinned Al-Zr alloy with significant 9R phase

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