Design of super-strong and thermally stable nanotwinned Al alloys: Via solute synergy

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

doi:10.1039/d0nr05707j

Design of super-strong and thermally stable nanotwinned Al alloys: Via solute synergy

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

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

14 Scopus citations

Abstract

Al alloys have widespread industrial applications. However, their mechanical strength is often much lower than steels. Here, we investigate the influence of solutes on achieving ultrahigh strength and thermal stability of nanotwinned Al alloys. In situ micropillar compression tests show the addition of a small amount of Ti can significantly increase the mechanical strength of Al-Ni alloys to 2 GPa. Deformation induced detwinning, Ni segregation and grain coarsening as discovered in binary Al-Ni alloys are mostly absent in the ternary Al-Ni-Ti alloys. Moreover, the ternary Al-Ni-Ti alloys have outstanding thermal stability. Density function theory calculations reveal the synergetic pinning effect of Ni-Ti solute pairs on incoherent twin boundaries. This study demonstrates that the proper selection of synergistic solute pairs is critical to improve the thermal stability and mechanical properties of nanotwinned Al alloys.

Original language	English
Pages (from-to)	20491-20505
Number of pages	15
Journal	Nanoscale
Volume	12
Issue number	39
DOIs	https://doi.org/10.1039/d0nr05707j
State	Published - Oct 21 2020
Externally published	Yes

Funding

This work is supported by the Department of Energy – Basic Energy Science (DOE Award number: DE-SC0016337). Accesses to the Microscopy Facilities at Purdue University and Center for Integrated Nanotechnologies (managed by Los Alamos National Laboratory) are also acknowledged. This work is supported by the Department of Energy - Basic Energy Science (DOE Award number: DE-SC0016337). Accesses to the Microscopy Facilities at Purdue University and Center for Integrated Nanotechnologies (managed by Los Alamos National Laboratory) are also acknowledged.

Funders	Funder number
Basic Energy Science
Department of Energy - Basic Energy Science
U.S. Department of Energy	DE-SC0016337
Los Alamos National Laboratory
Center for Integrated Nanotechnologies

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title = "Design of super-strong and thermally stable nanotwinned Al alloys: Via solute synergy",

abstract = "Al alloys have widespread industrial applications. However, their mechanical strength is often much lower than steels. Here, we investigate the influence of solutes on achieving ultrahigh strength and thermal stability of nanotwinned Al alloys. In situ micropillar compression tests show the addition of a small amount of Ti can significantly increase the mechanical strength of Al-Ni alloys to 2 GPa. Deformation induced detwinning, Ni segregation and grain coarsening as discovered in binary Al-Ni alloys are mostly absent in the ternary Al-Ni-Ti alloys. Moreover, the ternary Al-Ni-Ti alloys have outstanding thermal stability. Density function theory calculations reveal the synergetic pinning effect of Ni-Ti solute pairs on incoherent twin boundaries. This study demonstrates that the proper selection of synergistic solute pairs is critical to improve the thermal stability and mechanical properties of nanotwinned Al alloys.",

author = "Zhang, {Y. F.} and R. Su and Xie, {D. Y.} and Niu, {T. J.} and S. Xue and Q. Li and Z. Shang and J. Ding and Richter, {N. A.} and Jian Wang and H. Wang and X. Zhang",

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T1 - Design of super-strong and thermally stable nanotwinned Al alloys

T2 - Via solute synergy

AU - Zhang, Y. F.

AU - Su, R.

AU - Xie, D. Y.

AU - Niu, T. J.

AU - Xue, S.

AU - Li, Q.

AU - Shang, Z.

AU - Ding, J.

AU - Richter, N. A.

AU - Wang, Jian

AU - Wang, H.

AU - Zhang, X.

PY - 2020/10/21

Y1 - 2020/10/21

N2 - Al alloys have widespread industrial applications. However, their mechanical strength is often much lower than steels. Here, we investigate the influence of solutes on achieving ultrahigh strength and thermal stability of nanotwinned Al alloys. In situ micropillar compression tests show the addition of a small amount of Ti can significantly increase the mechanical strength of Al-Ni alloys to 2 GPa. Deformation induced detwinning, Ni segregation and grain coarsening as discovered in binary Al-Ni alloys are mostly absent in the ternary Al-Ni-Ti alloys. Moreover, the ternary Al-Ni-Ti alloys have outstanding thermal stability. Density function theory calculations reveal the synergetic pinning effect of Ni-Ti solute pairs on incoherent twin boundaries. This study demonstrates that the proper selection of synergistic solute pairs is critical to improve the thermal stability and mechanical properties of nanotwinned Al alloys.

AB - Al alloys have widespread industrial applications. However, their mechanical strength is often much lower than steels. Here, we investigate the influence of solutes on achieving ultrahigh strength and thermal stability of nanotwinned Al alloys. In situ micropillar compression tests show the addition of a small amount of Ti can significantly increase the mechanical strength of Al-Ni alloys to 2 GPa. Deformation induced detwinning, Ni segregation and grain coarsening as discovered in binary Al-Ni alloys are mostly absent in the ternary Al-Ni-Ti alloys. Moreover, the ternary Al-Ni-Ti alloys have outstanding thermal stability. Density function theory calculations reveal the synergetic pinning effect of Ni-Ti solute pairs on incoherent twin boundaries. This study demonstrates that the proper selection of synergistic solute pairs is critical to improve the thermal stability and mechanical properties of nanotwinned Al alloys.

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SN - 2040-3364

VL - 12

SP - 20491

EP - 20505

JO - Nanoscale

JF - Nanoscale

IS - 39

ER -

Design of super-strong and thermally stable nanotwinned Al alloys: Via solute synergy

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