Microstructure evolution and mechanical properties of aging 6061 Al alloy via laser shock processing

C. Y. Cui; T. Y. Wan; Y. X. Shu; S. Meng; X. G. Cui; J. Z. Lu; Y. F. Lu

doi:10.1016/j.jallcom.2019.06.347

Microstructure evolution and mechanical properties of aging 6061 Al alloy via laser shock processing

C. Y. Cui, T. Y. Wan, Y. X. Shu, S. Meng, X. G. Cui, J. Z. Lu, Y. F. Lu

Electrical & Computer Engineering

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

8 Scopus citations

Abstract

Microstructural evolution and mechanical properties of an aging 6061 Al alloy subjected to laser shock processing treatment (post-aging LSP treatment) were investigated by transmission electron microscopy (TEM) and mechanical tests. Results showed that the precipitates formed during aging treatment still remained, and the grain was refined by the ultra-high plastic strain plastic deformation during subsequent LSP treatment. Moreover, the precipitates effectively interacted with the dislocations induced by LSP. These typical microstructures contributed to the improvement in mechanical properties of the Al alloy. Relatively higher microhardness and strength were observed for the post-aging LSP Al sample. Furthermore, the synergistic strengthening mechanism involving the interaction of precipitate with dislocation, dislocations, and refined grains were clearly revealed.

Original language	English (US)
Pages (from-to)	1112-1118
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	803
DOIs	https://doi.org/10.1016/j.jallcom.2019.06.347
State	Published - Sep 30 2019

Keywords

Aging 6061 Al alloy
Grain refinement
Laser shock processing (LSP)
Precipitation
Strengthening mechanism

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Microstructure evolution and mechanical properties of aging 6061 Al alloy via laser shock processing",

abstract = "Microstructural evolution and mechanical properties of an aging 6061 Al alloy subjected to laser shock processing treatment (post-aging LSP treatment) were investigated by transmission electron microscopy (TEM) and mechanical tests. Results showed that the precipitates formed during aging treatment still remained, and the grain was refined by the ultra-high plastic strain plastic deformation during subsequent LSP treatment. Moreover, the precipitates effectively interacted with the dislocations induced by LSP. These typical microstructures contributed to the improvement in mechanical properties of the Al alloy. Relatively higher microhardness and strength were observed for the post-aging LSP Al sample. Furthermore, the synergistic strengthening mechanism involving the interaction of precipitate with dislocation, dislocations, and refined grains were clearly revealed.",

keywords = "Aging 6061 Al alloy, Grain refinement, Laser shock processing (LSP), Precipitation, Strengthening mechanism",

author = "Cui, {C. Y.} and Wan, {T. Y.} and Shu, {Y. X.} and S. Meng and Cui, {X. G.} and Lu, {J. Z.} and Lu, {Y. F.}",

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T1 - Microstructure evolution and mechanical properties of aging 6061 Al alloy via laser shock processing

AU - Cui, C. Y.

AU - Wan, T. Y.

AU - Shu, Y. X.

AU - Meng, S.

AU - Cui, X. G.

AU - Lu, J. Z.

AU - Lu, Y. F.

PY - 2019/9/30

Y1 - 2019/9/30

N2 - Microstructural evolution and mechanical properties of an aging 6061 Al alloy subjected to laser shock processing treatment (post-aging LSP treatment) were investigated by transmission electron microscopy (TEM) and mechanical tests. Results showed that the precipitates formed during aging treatment still remained, and the grain was refined by the ultra-high plastic strain plastic deformation during subsequent LSP treatment. Moreover, the precipitates effectively interacted with the dislocations induced by LSP. These typical microstructures contributed to the improvement in mechanical properties of the Al alloy. Relatively higher microhardness and strength were observed for the post-aging LSP Al sample. Furthermore, the synergistic strengthening mechanism involving the interaction of precipitate with dislocation, dislocations, and refined grains were clearly revealed.

AB - Microstructural evolution and mechanical properties of an aging 6061 Al alloy subjected to laser shock processing treatment (post-aging LSP treatment) were investigated by transmission electron microscopy (TEM) and mechanical tests. Results showed that the precipitates formed during aging treatment still remained, and the grain was refined by the ultra-high plastic strain plastic deformation during subsequent LSP treatment. Moreover, the precipitates effectively interacted with the dislocations induced by LSP. These typical microstructures contributed to the improvement in mechanical properties of the Al alloy. Relatively higher microhardness and strength were observed for the post-aging LSP Al sample. Furthermore, the synergistic strengthening mechanism involving the interaction of precipitate with dislocation, dislocations, and refined grains were clearly revealed.

KW - Aging 6061 Al alloy

KW - Grain refinement

KW - Laser shock processing (LSP)

KW - Precipitation

KW - Strengthening mechanism

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