Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Optimization of Thin Walls With Sharp Corners in SS316L and IN718 Alloys Manufactured with Laser Metal Deposition

Version 1 : Received: 17 November 2020 / Approved: 18 November 2020 / Online: 18 November 2020 (14:23:11 CET)

How to cite: Pereira, J.C.; Borokov, H.; Zubiri, F.; Guerra, M.C.; Caminos, J. Optimization of Thin Walls With Sharp Corners in SS316L and IN718 Alloys Manufactured with Laser Metal Deposition. Preprints 2020, 2020110483 (doi: 10.20944/preprints202011.0483.v1). Pereira, J.C.; Borokov, H.; Zubiri, F.; Guerra, M.C.; Caminos, J. Optimization of Thin Walls With Sharp Corners in SS316L and IN718 Alloys Manufactured with Laser Metal Deposition. Preprints 2020, 2020110483 (doi: 10.20944/preprints202011.0483.v1).

Abstract

In this work, the manufacture of thin walls with sharp corners has been optimized by adjusting the limits of a 3-axis cartesian kinematics through data recorded and analyzed off-line, such as axis speed, acceleration and the positioning of the X and Y axes. The study was carried out with two powder materials (SS316L and IN718) using the directed energy deposition process with laser. 1 mm thick walls were obtained with only one bead per layer and straight/sharp corners at 90º. After adjusting the in-position parameter G502 for positioning precision on the FAGOR 8070 CNC system, it has been possible to obtain walls with minimal accumulation of material in the corner, and with practically constant layer thickness and height, with a radii of internal curvature between 0.11 and 0.24 mm for two different precision configuration. The best results have been obtained by identifying the correct balance between the decrease in programmed speed and the precision in the positioning to reach the point defined as wall corner, with speed reductions of 29% for a programmed speed of 20 mm/s and 61% for a speed of 40 mm/s. The walls show minimal defects such as residual porosities, and the microstructure is adequate.

Subject Areas

additive manufacturing; laser metal deposition; thin walls; sharp corner; cartesian kinematic; FAGOR 8070 CNC

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.