The Effect Of Weave In Directed Energy Deposition of Thin Walled Geometries

Onderzoeksoutput: Unpublished paper

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Directed Energy Deposition, also often known as Laser Metal Deposition uses typically a fixed laser spot diameter in the range of 1 to 5 mm diameter. To manufacture objects with other wall thicknesses a lot of effort from the designer is required in order to chose integer multiples of laser spot size and track overlap to build features with the chosen wall thickness. In this paper we address the use of different weave trajectories when building thin-walled geometries to allow arbitrary wall thicknesses larger than the laser spot size. The effect of the weave pattern, pitch and wall thickness for different thin-walled geometries are studied by comparing resulting geometry and micrographs. Temperature measurement data and in-process melt pool monitoring data is presented to correlate qualitatively to the resulting geometrical properties of the build samples. It was observed that a trochoidal pattern allows for a constant velocity due to its smooth motion and hence theoretically results in a continuous microstructure throughout the part. It was however observed that the actual wall size has a major influence on the microstructure because the oscillations take longer on larger walls and multiple heating-cooling cycles including a remelting behavior can occur depending on the pattern pitch, toolpath velocity, and wall thickness relation.
Originele taal-2English
StatusUnpublished - 18 okt 2021
Evenement40th congress on applications of laser & electro-optics - Sheraton San Diego Hotel and Marina, San Diego, United States
Duur: 18 okt 202120 okt 2021
Congresnummer: 40
https://icaleo.org/

Conference

Conference40th congress on applications of laser & electro-optics
Verkorte titelICALEO
Land/RegioUnited States
StadSan Diego
Periode18/10/2120/10/21
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