| Autor: |
Dustin Kelly, Ralf D. Fischer, Mahyar Moaven, Sarah Morris, Barton C. Prorok, Brian Thurow |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Additive Manufacturing Letters, Vol 6, Iss , Pp 100134- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2772-3690 |
| DOI: |
10.1016/j.addlet.2023.100134 |
| Popis: |
This work discusses the implementation of a novel technique for simultaneous 3D particle tracking velocimetry and dual-wavelength pyrometry of spatter particles ejected during the Laser-Powder Bed Fusion (L-PBF) process using a single high-speed spectral plenoptic camera. In this methodology, particle tracking uses the Light-Field Ray Bundling algorithm paired with a four-frame best estimate track initiation with 3D Kalman filter for tracking to generate high-resolution, time-resolved 3D tracks of spatter particles. Utilizing the same light-field image data, spatter particle temperature is measured using dual-wavelength pyrometry that calculates temperature from the ratio of two narrow-band wavelength intensities. Preliminary results demonstrate the viability and potential of this technique for the L-PBF processes on the example of a turnaround laser scan. The temperature measurements indicate that the detected particles are in the liquid phase, with temperatures greater than 1950 °C. The simultaneous measurements demonstrate an overall deceleration and cooling of particles during their flight. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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