Improved Ductility by Reducing Powder Size in Laser Powder Bed Fusion of AlSi10Mg

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外文摘要：Strict control of powder properties,especially particle size distribution(PSD),is critical in the laser powder bed fusion(LPBF)process to ensure the quality of the fabricated parts.This work shows that reducing the powder size could improve the ductility of LPBF fabricated AlSi10Mg.The tensile elongation increased from 4.1％to 8.8％when AlSi10Mg powder sizes(D50 value)decreased from 76 μm to 16 μm in the as-fabricated state.Our results showed that fine powder size stimulates epitaxial grain growth due to excessive remelting.The presence of epitaxial columnar grains makes the crack path across inner melt pools more frequent and travels from the coarse melt pool zones to the fine melt pool zones.This work suggests that powder size is a crucial factor to be considered in maintaining repeatable mechanical properties in LPBF processes,particularly when ductility and ductility-dominated properties are critical.

外文关键词：

Particle size distributionLaser powder bed fusionDuctilityEpitaxial columnar grain

作者：

Fuzhong Chu、Haopeng Shen、Jianwen Liu、Juan Hou、Kai Zhang、Zongyan Zhou、Yuman Zhu、Xinhua Wu、Aijun Huang

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作者单位：

ARC Research Hub for Computational Particle Technology,Department of Chemical and Biological Engineering,Monash University,Clayton,VIC 3800,Australia

Monash Centre for Additive Manufacturing,Monash University,Notting Hill,VIC 3168,Australia

Department of Materials Science and Engineering,Monash University,Clayton,VIC 3800,Australia

School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai,200093,China

Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems,Jiangxi University of Science and Technology,Nanchang,330013,China

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出版年：

2024

DOI：

10.1016/j.amf.2024.200122

中国机械工程学报:增材制造前沿(英文)

ISSN：

年,卷(期)：2024.3(1)