An experimental study of effect of printed thickness on the mechanical properties of LPBF produced AlSi10Mg

An experimental study of effect of printed thickness on the mechanical properties of LPBF produced AlSi10Mg

FAHIMI Pouya, VYSOCHINSKIY Dmitry, KHADYKO Mikhail

Abstract. Additive manufacturing process allows fabrication of parts with a broad range of sizes with high resolution. This size variation introduces new mechanical properties within the printed component, which creates a significant challenge for the qualification of additively manufactured parts. This unresolved issue hinders the implementation of additive manufacturing in high performance engineering applications. To attain optimal performance of additive components, it is imperative to gain a comprehensive understanding of the size effect. While many studies have explored the mechanical properties and microstructure of additively manufactured AlSi10Mg, the size effect remains relatively undefined. To gain more knowledge on this matter, AlSi10Mg samples with four different thicknesses were fabricated using a selective laser melting machine and tensile tests were performed to characterize the material behavior. Stress-strain curves were derived with consideration of nominal and measured cross section and the resulting diagram showed a considerable difference for the samples with minimum thickness, which was 0.5 mm. Comparing the results between the 2 mm and 0.5 mm thick specimens demonstrated more than 50 percent decrease in tensile properties including ultimate tensile strength and elongation at fracture. Also, the study of strain rate indicated no significant strain rate sensitivity for either thickness. These findings contribute to better understanding the size effects on behavior of printed AlSi10Mg, promoting further commercial adoption of this material.

Keywords
Selective Laser Melting, Size Effect, AlSi10Mg, Metal Additive Manufacturing, Tensile Testing, Powder Bed Fusion

Published online 4/24/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: FAHIMI Pouya, VYSOCHINSKIY Dmitry, KHADYKO Mikhail, An experimental study of effect of printed thickness on the mechanical properties of LPBF produced AlSi10Mg, Materials Research Proceedings, Vol. 41, pp 137-145, 2024

DOI: https://doi.org/10.21741/9781644903131-15

The article was published as article 15 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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