Uniting high strength with large ductility in an additively manufactured fine-grained aluminum alloy

Wenhao Cha; Gan Li; Xi He; Jie Li; Daoxiu Li; Xiangfa Liu; Qiang Zhu; Sida Liu

doi:10.1080/21663831.2024.2449175

Materials Research Letters (Jan 2025)

Uniting high strength with large ductility in an additively manufactured fine-grained aluminum alloy

Wenhao Cha,
Gan Li,
Xi He,
Jie Li,
Daoxiu Li,
Xiangfa Liu,
Qiang Zhu,
Sida Liu

Affiliations

Wenhao Cha: Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi’an Jiaotong University, Xi’an, People’s Republic of China
Gan Li: City University of Hong Kong Matter Science Research Institute (Futian), Shenzhen, People’s Republic of China
Xi He: Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, People’s Republic of China
Jie Li: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, People’s Republic of China
Daoxiu Li: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, People’s Republic of China
Xiangfa Liu: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, People’s Republic of China
Qiang Zhu: Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, People’s Republic of China
Sida Liu: Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi’an Jiaotong University, Xi’an, People’s Republic of China

DOI: https://doi.org/10.1080/21663831.2024.2449175

Abstract

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Actualizing the near net-shaping of lightweight aluminum (Al) alloys with both superior mechanical performance and complex geometry remains challenging. To address this issue, novel Al–Ti–C–B (TCB) master alloy powders were tailored as effective inoculators and introduced into the AlSi10Mg alloy powders to promote the heterogeneous nucleation of α-Al during powder bed fusion using laser beam (PBF-LB), leading to pronounced heterogeneous microstructure with bimodal fine-grains and improved distribution of eutectic Si. The modified alloy with a more refined and homogeneous microstructure exhibited an excellent strength–ductility combination due to microstructure modification, outperforming most previously reported commercial Al–Si alloys.

Published in Materials Research Letters

ISSN: 2166-3831 (Online)
Publisher: Taylor & Francis Group
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.tandfonline.com/journals/tmrl

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