Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting

Peng Peng; Jiang Ju; Ting Feng; Tao Yang; Bo Xiao; Junhua Luan; Yufei Wang; Haiyan Gao; Haiyang Lv; Jun Wang; Baode Sun

doi:10.1016/j.compositesb.2025.112244

Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting

Peng Peng
, Jiang Ju^*
, Ting Feng
, Tao Yang^*
, Bo Xiao
, Junhua Luan
, Yufei Wang
, Haiyan Gao^*
, Haiyang Lv
, Jun Wang
, Baode Sun

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

23 Citations (Scopus)

Abstract

A novel Al-9.5Ce-0.6Mg/0.7GNPs (wt. %) composite with a network co-continuous Al/(Al, Mg)₁₁Ce₃ eutectic structure was fabricated using laser powder bed fusion. Mg mainly exists in the Al₁₁Ce₃ phase rather than the Al matrix. The as-built composite achieved superior ultimate tensile strength (UTS) of ∼452 ± 3 MPa and an elongation of ∼5.6 ± 0.3 %. Heat treatment enhanced elongation (13.2 ± 0.3 %) while maintaining high UTS (406 ± 6 MPa), ∼4 and ∼5 times higher than as-cast Al–Ce alloy, respectively. High strength is ascribed to grain refinement, Orowan strengthening, and load transfer strengthening. The breakage of the (Al, Mg)₁₁Ce₃ network was key to obtaining excellent ductility. The HT composite exhibits excellent corrosion resistance that is an order of magnitude higher than that of as-cast Al–Ce alloy in 3.5 wt % NaCl solution, Additionally, the galvanic corrosion between α-Al and (Al, Mg)₁₁Ce₃ as well as the preferred corrosion of the melt pool boundary (MPB) was inhibited. This work provides a new idea for developing high strength-ductility synergy and corrosion resistance via additive manufacturing (AM) processing technique. © 2025 Elsevier Ltd.

Original language	English
Article number	112244
Journal	Composites Part B: Engineering
Volume	296
Online published	11 Feb 2025
DOIs	https://doi.org/10.1016/j.compositesb.2025.112244
Publication status	Published - 1 May 2025

Funding

This work was supported by the National Natural Science Foundation of China (No. 52031012), Science and Technology Innovation Action Plan Project of Shanghai, China (No. 21XD1434900. APT research was conducted at the Inter-University 3D APT Unit of City University of Hong Kong (CityU), which is supported by the CityU grant 9360161. The authors would give great thanks to the staff from the Instrumental Analysis Center of Shanghai Jiao Tong University.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Al–Ce/GNPs composite
Corrosion resistance
Laser powder bed fusion
Mechanical property
Microstructure
Multi-scale characterization

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10.1016/j.compositesb.2025.112244

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Peng, P., Ju, J., Feng, T., Yang, T., Xiao, B., Luan, J., Wang, Y., Gao, H., Lv, H., Wang, J., & Sun, B. (2025). Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting. Composites Part B: Engineering, 296, Article 112244. https://doi.org/10.1016/j.compositesb.2025.112244

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title = "Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting",

abstract = "A novel Al-9.5Ce-0.6Mg/0.7GNPs (wt. \%) composite with a network co-continuous Al/(Al, Mg)11Ce3 eutectic structure was fabricated using laser powder bed fusion. Mg mainly exists in the Al11Ce3 phase rather than the Al matrix. The as-built composite achieved superior ultimate tensile strength (UTS) of ∼452 ± 3 MPa and an elongation of ∼5.6 ± 0.3 \%. Heat treatment enhanced elongation (13.2 ± 0.3 \%) while maintaining high UTS (406 ± 6 MPa), ∼4 and ∼5 times higher than as-cast Al–Ce alloy, respectively. High strength is ascribed to grain refinement, Orowan strengthening, and load transfer strengthening. The breakage of the (Al, Mg)11Ce3 network was key to obtaining excellent ductility. The HT composite exhibits excellent corrosion resistance that is an order of magnitude higher than that of as-cast Al–Ce alloy in 3.5 wt \% NaCl solution, Additionally, the galvanic corrosion between α-Al and (Al, Mg)11Ce3 as well as the preferred corrosion of the melt pool boundary (MPB) was inhibited. This work provides a new idea for developing high strength-ductility synergy and corrosion resistance via additive manufacturing (AM) processing technique. {\textcopyright} 2025 Elsevier Ltd.",

keywords = "Al–Ce/GNPs composite, Corrosion resistance, Laser powder bed fusion, Mechanical property, Microstructure, Multi-scale characterization",

author = "Peng Peng and Jiang Ju and Ting Feng and Tao Yang and Bo Xiao and Junhua Luan and Yufei Wang and Haiyan Gao and Haiyang Lv and Jun Wang and Baode Sun",

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Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting. / Peng, Peng; Ju, Jiang; Feng, Ting et al.
In: Composites Part B: Engineering, Vol. 296, 112244, 01.05.2025.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting

AU - Peng, Peng

AU - Ju, Jiang

AU - Feng, Ting

AU - Yang, Tao

AU - Xiao, Bo

AU - Luan, Junhua

AU - Wang, Yufei

AU - Gao, Haiyan

AU - Lv, Haiyang

AU - Wang, Jun

AU - Sun, Baode

PY - 2025/5/1

Y1 - 2025/5/1

N2 - A novel Al-9.5Ce-0.6Mg/0.7GNPs (wt. %) composite with a network co-continuous Al/(Al, Mg)11Ce3 eutectic structure was fabricated using laser powder bed fusion. Mg mainly exists in the Al11Ce3 phase rather than the Al matrix. The as-built composite achieved superior ultimate tensile strength (UTS) of ∼452 ± 3 MPa and an elongation of ∼5.6 ± 0.3 %. Heat treatment enhanced elongation (13.2 ± 0.3 %) while maintaining high UTS (406 ± 6 MPa), ∼4 and ∼5 times higher than as-cast Al–Ce alloy, respectively. High strength is ascribed to grain refinement, Orowan strengthening, and load transfer strengthening. The breakage of the (Al, Mg)11Ce3 network was key to obtaining excellent ductility. The HT composite exhibits excellent corrosion resistance that is an order of magnitude higher than that of as-cast Al–Ce alloy in 3.5 wt % NaCl solution, Additionally, the galvanic corrosion between α-Al and (Al, Mg)11Ce3 as well as the preferred corrosion of the melt pool boundary (MPB) was inhibited. This work provides a new idea for developing high strength-ductility synergy and corrosion resistance via additive manufacturing (AM) processing technique. © 2025 Elsevier Ltd.

AB - A novel Al-9.5Ce-0.6Mg/0.7GNPs (wt. %) composite with a network co-continuous Al/(Al, Mg)11Ce3 eutectic structure was fabricated using laser powder bed fusion. Mg mainly exists in the Al11Ce3 phase rather than the Al matrix. The as-built composite achieved superior ultimate tensile strength (UTS) of ∼452 ± 3 MPa and an elongation of ∼5.6 ± 0.3 %. Heat treatment enhanced elongation (13.2 ± 0.3 %) while maintaining high UTS (406 ± 6 MPa), ∼4 and ∼5 times higher than as-cast Al–Ce alloy, respectively. High strength is ascribed to grain refinement, Orowan strengthening, and load transfer strengthening. The breakage of the (Al, Mg)11Ce3 network was key to obtaining excellent ductility. The HT composite exhibits excellent corrosion resistance that is an order of magnitude higher than that of as-cast Al–Ce alloy in 3.5 wt % NaCl solution, Additionally, the galvanic corrosion between α-Al and (Al, Mg)11Ce3 as well as the preferred corrosion of the melt pool boundary (MPB) was inhibited. This work provides a new idea for developing high strength-ductility synergy and corrosion resistance via additive manufacturing (AM) processing technique. © 2025 Elsevier Ltd.

KW - Al–Ce/GNPs composite

KW - Corrosion resistance

KW - Laser powder bed fusion

KW - Mechanical property

KW - Microstructure

KW - Multi-scale characterization

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DO - 10.1016/j.compositesb.2025.112244

M3 - RGC 21 - Publication in refereed journal

SN - 1359-8368

VL - 296

JO - Composites Part B: Engineering

JF - Composites Part B: Engineering

M1 - 112244

ER -

Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting

Abstract

Funding

UN SDGs

Research Keywords

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ResFac: Inter-University 3D Atom Probe Tomography Unit

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Unraveling the corrosion behavior and enhanced strength-ductility synergy mechanism of a novel Al–Ce/GNPs composite fabricated by selective laser melting

Abstract

Funding

UN SDGs

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

ResFac: Inter-University 3D Atom Probe Tomography Unit

Cite this