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Name: Infrared and visual in-situ measuremnets of components made from AISI 316L in Laser Beam Direct Energy Deposition
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Authors:

Lars Sommerlade (1), Alec Hilberg (2), Florian Stredak (3), Robert Schmoll (1), Simon J. Altenburg (2), Stefan Boehm (3), Andreas Kroll (1)

(1) University of Kassel, Faculty of Mechanical Engineering, Measurement and Control Research Group
(2) Bundesanstalt fuer Materialforschung und -pruefung (BAM)
(3) University of Kassel, Faculty of Mechanical Engineering, Department for Cutting and Joining Manufacturing Processes
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Description of the dataset:

The presented dataset comprises a measurement campaign conducted on the laser beam direct energy depositio (DED-LB/M) system LMD² of the University of Kassel. 
In DED-LB/M, metal powder is blown into a laser beam, where it is melted and deposited to build up material. Within this campaign, three specimens made of AISI 316L Powder were manufactured. 
Each specimen consists of ten adjacent deposited tracks, produced under identical process conditions. 
For the measurements, the build table was tilted by 55° to provide the cameras with an improved viewing angle of the process zone.
The manufacturing process was recorded in-situ using three camera systems: a visible RGB camera (Basler ace 2 R PRO) and two midwave infrared (MWIR) cameras (InfraTec ImageIR 8380 hp & Telops MS M3k). 
The first MWIR infrared camera (InfraTec ImageIR 8380 hp) captured HDR single-frame images covering a temperature range from 300 to 2000 °C (BlackBody radiation, emissivity = 1) using various optical filters and integration times. 
The second MWIR infrared camera (Telops MS M3k) captured eight-frame images from eight different wavelenght areas using eight different rotating optical filters.
In addition, the visible RGB camera acquired HDR single-frame images at three different exposure times to robustly capture both very bright and darker regions of the scene.

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Data Structure:

dataset_root/
├─ Experimental_setup.JPEG
├─ Machine_code/
│  ├─ Machine_code_3_LWS_55.din
│  ├─ Machine_code_4_LWS_55.din
│  └─ Machine_code_5_LWS_55.din
├─ Metadata.csv
├─ Read_data/
├─ Workpieces/
│  ├─ Workpieces_03_LWS_55.jpeg
│  ├─ Workpieces_04_LWS_55.jpeg
│  └─ Workpieces_05_LWS_55.jpeg
└─ *.h5                        # Camera measurements

Description of contents
   - Experimental_setup.JPEG: Photo of the experimental setup.
   - Metadata.csv: Central metadata file containing process and camera parameters, as well as the mapping of individual measurement files (.h5) to the corresponding experiments/workpieces.
   - *.h5: Camera measurement data (visible RGB (Basler ace 2 R PRO) and MWIR recordings (InfraTec ImageIR 8380 hp and Telops MS M3k)) stored in HDF5 format.
   - Read_data/: Example code/scripts for loading and using the measurement data (e.g., opening a visible RGB and an infrared measurement (MWIR)).
   - Workpieces/: Images of the manufactured workpieces.
   - Machine_code/: Machine programs (.din) used to control the system for the respective workpieces. Note that the machine code is the same for each experiment.

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Usage of the Datasets:

To load and use the individual measurements, the code provided in the folder Read_data can be used. 
It includes an example demonstrating how to open a single measurement from the visible RGB camera and the infrared cameras (MWIR), respectively.


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Support:

lars.sommerlade@mrt.uni-kassel.de
robert.schmoll@mrt.uni-kassel.de
andreas.kroll@mrt.uni-kassel.de
alec.hilberg@bam.de