Deformation behavior and phase transformation of nanotwinned Al/Ti multilayers

Y. F. Zhang; Qiang Li; M. Gong; S. Xue; J. Ding; Jin Li; J. Cho; T. Niu; Ruizhe Su; N. A. Richter; H. Wang; J. Wang; X. Zhang

doi:10.1016/j.apsusc.2020.146776

Deformation behavior and phase transformation of nanotwinned Al/Ti multilayers

Y. F. Zhang, Qiang Li, M. Gong, S. Xue, J. Ding, Jin Li, J. Cho, T. Niu, Ruizhe Su, N. A. Richter, H. Wang, J. Wang, X. Zhang

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

35 Scopus citations

Abstract

Nanotwinned Al/Ti multilayers have exhibited size-dependent microstructure evolution and high strength. However, their deformation mechanisms are less well understood. In this work, we investigated the deformation mechanisms of nanotwinned Al/Ti multilayers with FCC/HCP layer interfaces by using in situ micropillar compression tests. Nanotwinned Al/Ti multilayers exhibit compressive strength up to 2.4 GPa and good work hardening capability. Post-compression TEM analyses reveal high-density stacking faults and the HCP-to-FCC phase transformations in Ti. Molecular dynamics simulations elucidate the mechanisms of deformation induced phase transformation in Ti and the influence of collective movement of partial dislocations on the deformability of Al/Ti multilayers.

Original language	English
Article number	146776
Journal	Applied Surface Science
Volume	527
DOIs	https://doi.org/10.1016/j.apsusc.2020.146776
State	Published - Oct 15 2020
Externally published	Yes

Funding

This work is supported by the DoE-BES (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 DoE-BES (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
DOE-BES	DE-SC0016337
Los Alamos National Laboratory
Center for Integrated Nanotechnologies

Keywords

Al/Ti multilayer
In situ micropillar compression
MD simulation
Nanotwin
Phase transformation
Sputtering

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10.1016/j.apsusc.2020.146776

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title = "Deformation behavior and phase transformation of nanotwinned Al/Ti multilayers",

abstract = "Nanotwinned Al/Ti multilayers have exhibited size-dependent microstructure evolution and high strength. However, their deformation mechanisms are less well understood. In this work, we investigated the deformation mechanisms of nanotwinned Al/Ti multilayers with FCC/HCP layer interfaces by using in situ micropillar compression tests. Nanotwinned Al/Ti multilayers exhibit compressive strength up to 2.4 GPa and good work hardening capability. Post-compression TEM analyses reveal high-density stacking faults and the HCP-to-FCC phase transformations in Ti. Molecular dynamics simulations elucidate the mechanisms of deformation induced phase transformation in Ti and the influence of collective movement of partial dislocations on the deformability of Al/Ti multilayers.",

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author = "Zhang, {Y. F.} and Qiang Li and M. Gong and S. Xue and J. Ding and Jin Li and J. Cho and T. Niu and Ruizhe Su and Richter, {N. A.} and H. Wang and J. Wang and X. Zhang",

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AU - Zhang, Y. F.

AU - Li, Qiang

AU - Gong, M.

AU - Xue, S.

AU - Ding, J.

AU - Li, Jin

AU - Cho, J.

AU - Niu, T.

AU - Su, Ruizhe

AU - Richter, N. A.

AU - Wang, H.

AU - Wang, J.

AU - Zhang, X.

PY - 2020/10/15

Y1 - 2020/10/15

N2 - Nanotwinned Al/Ti multilayers have exhibited size-dependent microstructure evolution and high strength. However, their deformation mechanisms are less well understood. In this work, we investigated the deformation mechanisms of nanotwinned Al/Ti multilayers with FCC/HCP layer interfaces by using in situ micropillar compression tests. Nanotwinned Al/Ti multilayers exhibit compressive strength up to 2.4 GPa and good work hardening capability. Post-compression TEM analyses reveal high-density stacking faults and the HCP-to-FCC phase transformations in Ti. Molecular dynamics simulations elucidate the mechanisms of deformation induced phase transformation in Ti and the influence of collective movement of partial dislocations on the deformability of Al/Ti multilayers.

AB - Nanotwinned Al/Ti multilayers have exhibited size-dependent microstructure evolution and high strength. However, their deformation mechanisms are less well understood. In this work, we investigated the deformation mechanisms of nanotwinned Al/Ti multilayers with FCC/HCP layer interfaces by using in situ micropillar compression tests. Nanotwinned Al/Ti multilayers exhibit compressive strength up to 2.4 GPa and good work hardening capability. Post-compression TEM analyses reveal high-density stacking faults and the HCP-to-FCC phase transformations in Ti. Molecular dynamics simulations elucidate the mechanisms of deformation induced phase transformation in Ti and the influence of collective movement of partial dislocations on the deformability of Al/Ti multilayers.

KW - Al/Ti multilayer

KW - In situ micropillar compression

KW - MD simulation

KW - Nanotwin

KW - Phase transformation

KW - Sputtering

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VL - 527

JO - Applied Surface Science

JF - Applied Surface Science

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Deformation behavior and phase transformation of nanotwinned Al/Ti multilayers

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Keywords

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