Solute synergy induced thermal stability of high-strength nanotwinned Al-Co-Zr alloys

N. A. Richter; Y. F. Zhang; M. Gong; T. Niu; B. Yang; S. Xue; J. Wang; H. Wang; X. Zhang

doi:10.1016/j.msea.2022.144477

Solute synergy induced thermal stability of high-strength nanotwinned Al-Co-Zr alloys

N. A. Richter, Y. F. Zhang, M. Gong, T. Niu, B. Yang, S. Xue, J. Wang, H. Wang, X. Zhang

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

3 Scopus citations

Abstract

Reducing the grain size into the nanoscale regime in metallic materials provides high mechanical strengths, however at the cost of degrading thermal stability, as grain refinement induces a high driving force for grain coarsening. In this study, we present a solute synergy strategy that stabilizes the microstructures of high strength nanotwinned (NT) Al–Co–Zr alloys. Zr solute additions promote microstructural and mechanical stability up to an annealing temperature of 400 °C. In-situ microcompression tests demonstrate concomitant high strengths and deformability in these ternary NT alloys. Density functional theory calculations provide insight into the interplay between Co and Zr solute and how they pin and stabilize incoherent twin boundaries. This work provides a strategy for enhancing both strength and thermal stability of nanocrystalline materials when combining synergistic solute pairs.

Original language	English
Article number	144477
Journal	Materials Science and Engineering: A
Volume	862
DOIs	https://doi.org/10.1016/j.msea.2022.144477
State	Published - Jan 18 2023
Externally published	Yes

Funding

This project is primarily funded by DoE-BES (Basic Energy Sciences) under grant no. DE-SC0016337. H. Wang acknowledges the support from the U.S. Office of Naval Research (N00014–16–1–2778). Access to the Life Sciences Microscopy Center and Materials Science Microscopy Center at Purdue University are also acknowledged. This project is primarily funded by DoE-BES (Basic Energy Sciences) under grant no. DE-SC0016337 . H. Wang acknowledges the support from the U.S. Office of Naval Research ( N00014–16–1–2778 ). Access to the Life Sciences Microscopy Center and Materials Science Microscopy Center at Purdue University are also acknowledged.

Funders	Funder number
Office of Naval Research	N00014–16–1–2778
Basic Energy Sciences	DE-SC0016337
Purdue University

Keywords

Aluminum alloys
Nanomechanics
Nanotwinned metals
Thermal stability
Transmission electron microscopy

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title = "Solute synergy induced thermal stability of high-strength nanotwinned Al-Co-Zr alloys",

abstract = "Reducing the grain size into the nanoscale regime in metallic materials provides high mechanical strengths, however at the cost of degrading thermal stability, as grain refinement induces a high driving force for grain coarsening. In this study, we present a solute synergy strategy that stabilizes the microstructures of high strength nanotwinned (NT) Al–Co–Zr alloys. Zr solute additions promote microstructural and mechanical stability up to an annealing temperature of 400 °C. In-situ microcompression tests demonstrate concomitant high strengths and deformability in these ternary NT alloys. Density functional theory calculations provide insight into the interplay between Co and Zr solute and how they pin and stabilize incoherent twin boundaries. This work provides a strategy for enhancing both strength and thermal stability of nanocrystalline materials when combining synergistic solute pairs.",

keywords = "Aluminum alloys, Nanomechanics, Nanotwinned metals, Thermal stability, Transmission electron microscopy",

author = "Richter, {N. A.} and Zhang, {Y. F.} and M. Gong and T. Niu and B. Yang and S. Xue and J. Wang and H. Wang and X. Zhang",

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T1 - Solute synergy induced thermal stability of high-strength nanotwinned Al-Co-Zr alloys

AU - Richter, N. A.

AU - Zhang, Y. F.

AU - Gong, M.

AU - Niu, T.

AU - Yang, B.

AU - Xue, S.

AU - Wang, J.

AU - Wang, H.

AU - Zhang, X.

PY - 2023/1/18

Y1 - 2023/1/18

N2 - Reducing the grain size into the nanoscale regime in metallic materials provides high mechanical strengths, however at the cost of degrading thermal stability, as grain refinement induces a high driving force for grain coarsening. In this study, we present a solute synergy strategy that stabilizes the microstructures of high strength nanotwinned (NT) Al–Co–Zr alloys. Zr solute additions promote microstructural and mechanical stability up to an annealing temperature of 400 °C. In-situ microcompression tests demonstrate concomitant high strengths and deformability in these ternary NT alloys. Density functional theory calculations provide insight into the interplay between Co and Zr solute and how they pin and stabilize incoherent twin boundaries. This work provides a strategy for enhancing both strength and thermal stability of nanocrystalline materials when combining synergistic solute pairs.

AB - Reducing the grain size into the nanoscale regime in metallic materials provides high mechanical strengths, however at the cost of degrading thermal stability, as grain refinement induces a high driving force for grain coarsening. In this study, we present a solute synergy strategy that stabilizes the microstructures of high strength nanotwinned (NT) Al–Co–Zr alloys. Zr solute additions promote microstructural and mechanical stability up to an annealing temperature of 400 °C. In-situ microcompression tests demonstrate concomitant high strengths and deformability in these ternary NT alloys. Density functional theory calculations provide insight into the interplay between Co and Zr solute and how they pin and stabilize incoherent twin boundaries. This work provides a strategy for enhancing both strength and thermal stability of nanocrystalline materials when combining synergistic solute pairs.

KW - Aluminum alloys

KW - Nanomechanics

KW - Nanotwinned metals

KW - Thermal stability

KW - Transmission electron microscopy

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DO - 10.1016/j.msea.2022.144477

M3 - Article

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SN - 0921-5093

VL - 862

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

M1 - 144477

ER -

Solute synergy induced thermal stability of high-strength nanotwinned Al-Co-Zr alloys

Abstract

Funding

Keywords

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