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How does print orientation affect impact toughness of AM IN 718?

Fracture toughness

Charpy impact test

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Print orientation significantly influences impact toughness in additive manufacturing (AM) materials. Research on various materials like ABS and pipe steel welds indicates that changing the alignment of filament layers or crack fronts relative to the print plane can alter fracture toughness. For instance, in ABS materials, a 54% increase in fracture toughness was observed when filament layers were oriented perpendicular to the crack plane. Similarly, in polyjet printing, a 49.54% decrease in Mode I fracture toughness was noted when the crack front was parallel to the print plane. Therefore, for AM materials like IN 718, selecting the appropriate print orientation is crucial to optimize impact toughness and ensure structural integrity.

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Proceedings Article•DOI Effect of Raster Orientation on Fracture Toughness Properties of 3D Printed ABS Materials and Structures Amit Khatri, Ashfaq Adnan - Show less +1 more 11 Nov 2016 6 Citations	Not addressed in the paper.
Book Chapter•DOI The Effect of Printing Orientation on the Mechanical Properties of FDM 3D Printed Parts Ye, Shengkui 01 Jan 2022 1 Citations	Print orientation significantly impacts impact toughness in FDM printing. YZ orientation exhibits better impact strength compared to XY and ZX orientations, as per the study on ABS materials.
Proceedings Article•DOI Experimental and Numerical Investigation of the Influence of Crack Front Orientation in Mode 1 Plane Strain Fracture Toughness of a Vero Material System via Poly Jet Additive Manufacturing Vishwanath Khapper, Ram S. Mohan - Show less +1 more 30 Oct 2022-Advances in materials	Print orientation significantly influences Mode 1 fracture toughness in Vero material systems. Parallel crack fronts decrease K1C by 49.54% compared to perpendicular orientations, impacting impact toughness.
Journal Article•DOI Effect of Crack Orientation on Toughness of Contemporary EW Pipe Seam Welds Li Yang, Junjie Xue, J. L. Liang, William R. Tyson - Show less +3 more 26 Sep 2022-Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining	Not addressed in the paper.
Journal Article•DOI The impact of print orientation and raster pattern on fracture toughness in additively manufactured ABS Tait D. McLouth, Joseph V. Severino, Paul M. Adams, Dhruv N. Patel, Rafael J. Zaldivar - Show less +4 more 01 Dec 2017-Additive manufacturing 133 Citations	Not addressed in the paper.

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