Highly ductile and mechanically strong Al-alloy/boron nitride nanosheet composites manufactured by laser additive manufacturing

Qingshi Meng; Caiying Chen; Sherif Araby; Rui Cai; Xuanyi Yang; Pengxu Li; Wang Wei

doi:10.1016/j.jmapro.2023.01.051

Highly ductile and mechanically strong Al-alloy/boron nitride nanosheet composites manufactured by laser additive manufacturing

Qingshi Meng, Caiying Chen, Sherif Araby, Rui Cai, Xuanyi Yang, Pengxu Li, Wang Wei

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Abstract

Laser metal deposition (LMD) is one of the prospective additive manufacturing (AM) processes to fabricate metal-based nanocomposites. In this study, aluminum alloy (AlSi10Mg) was reinforced by boron nitride nanosheets (BNNSs) via LMD method. High speed ball-milling was used to mix AlSi10Mg powder with BNNSs at fraction range 0.05‒0.2 wt.%. Comprehensive morphology analysis as well as structure-property relations were investigated. The study showed that adding BNNSs into Al-alloy via LMD process not only promoted the hardness (40%) and mechanical properties of the matrix (24%, 100% and 96% increments in ultimate tensile strength, yield strength and Young’s modulus, respectively), but also significantly improved its ductility (~300% increase). This has been observed clearly in fracture analysis where ductile fracture features were the dominant mode for all prepared samples. According to the observations by optical microscopy and electron backscattered diffraction, BNNSs have a crucial effect on grain refinement; grain size reduced from ~30.4 to 17.5µm upon the addition of 0.2 wt.% of BNNSs. In addition, during LMD process, hard mesophase of aluminum nitride was formed which assisted BNNSs in reinforcing the Al-alloy. The results helped to understand the microstructure changes and mechanical properties improvements when LMD method was used.

Original language	English
Pages (from-to)	384-396
Number of pages	13
Journal	Journal of Manufacturing Processes
Volume	89
Early online date	6 Feb 2023
DOIs	https://doi.org/10.1016/j.jmapro.2023.01.051
Publication status	Published - 3 Mar 2023

Bibliographical note

© 2023, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.

Funding

This work was financially supported by the Open Fund of Key Laboratory of Fundamental Science for Aeronautical Digital Manufacturing Process of Shenyang Aerospace University (SHSYS201905) and the Plan of Rejuvenating the Talents of Liaoning Province (XLYC1907135).

Funders	Funder number
Shenyang Aerospace University	SHSYS201905
Plan of rejuvenating the talents of Liaoning province	XLYC1907135

Keywords

Aluminum matrix composites
Laser metal deposition
Ball milling
Mechanical properties

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10.1016/j.jmapro.2023.01.051

Cai2023AAMAccepted author manuscript, 2.43 MBLicence: CC BY-NC-ND

Cite this

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title = "Highly ductile and mechanically strong Al-alloy/boron nitride nanosheet composites manufactured by laser additive manufacturing",

abstract = "Laser metal deposition (LMD) is one of the prospective additive manufacturing (AM) processes to fabricate metal-based nanocomposites. In this study, aluminum alloy (AlSi10Mg) was reinforced by boron nitride nanosheets (BNNSs) via LMD method. High speed ball-milling was used to mix AlSi10Mg powder with BNNSs at fraction range 0.05‒0.2 wt.%. Comprehensive morphology analysis as well as structure-property relations were investigated. The study showed that adding BNNSs into Al-alloy via LMD process not only promoted the hardness (40%) and mechanical properties of the matrix (24%, 100% and 96% increments in ultimate tensile strength, yield strength and Young{\textquoteright}s modulus, respectively), but also significantly improved its ductility (~300% increase). This has been observed clearly in fracture analysis where ductile fracture features were the dominant mode for all prepared samples. According to the observations by optical microscopy and electron backscattered diffraction, BNNSs have a crucial effect on grain refinement; grain size reduced from ~30.4 to 17.5µm upon the addition of 0.2 wt.% of BNNSs. In addition, during LMD process, hard mesophase of aluminum nitride was formed which assisted BNNSs in reinforcing the Al-alloy. The results helped to understand the microstructure changes and mechanical properties improvements when LMD method was used. ",

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AU - Araby, Sherif

AU - Cai, Rui

AU - Yang, Xuanyi

AU - Li, Pengxu

AU - Wei, Wang

N1 - © 2023, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.

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ER -

Highly ductile and mechanically strong Al-alloy/boron nitride nanosheet composites manufactured by laser additive manufacturing

Abstract

Bibliographical note

Funding

Keywords

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