Description
The absolute laser absorption was measured simultaneously with X-ray imaging during laser melting of Ti-6Al-4V solid metal. The data included here are the time-resolved absolute absorbed power and the Xray images acquired at the same time, along with timing data for synchronization. Also included is information about the experimental configuration including applied laser power, laser beam spatial profile, and the experimental setup. A text document is included that describes all files. There are datasets from two experimental configurations: 1) A stationary, 2.0 ms laser pulse and 2) a 700 mm/s scanned laser.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| 2525_README_v200.txt | Text | A text file containing references to data, experimental information, and descriptions of all files available for download. | Open resource |
| 2525_README_v200.txt | Text | A text file containing references to data, experimental information, and descriptions of all files available for download. | Open resource |
| Al_Scan_AA_MWD_ASR_Results.csv | CSV | Results from the AM Bench challenge problems for average absorption, melt pool width, melt pool depth, and average solidification rate for a scanned laser on aluminium. | Open resource |
| Al_Scan_AA_MWD_ASR_Results.csv | Text | Results from the AM Bench challenge problems for average absorption, melt pool width, melt pool depth, and average solidification rate for a scanned laser on aluminium. | Open resource |
| Al_Scan_TDA_v2_Results.csv | CSV | Results from the AM Bench challenge problems for time dependent absorption during scanned laser on aluminium. | Open resource |
| Al_Scan_TDA_v2_Results.csv | Text | Results from the AM Bench challenge problems for time dependent absorption during scanned laser on aluminium. | Open resource |
| Al_Spot_AA_ASR_Results.csv | CSV | Results for AM Bench challenge problems for average absorption and average solidification rate of a stationary laser spot on aluminum. | Open resource |
| Al_Spot_AA_ASR_Results.csv | Text | Results for AM Bench challenge problems for average absorption and average solidification rate of a stationary laser spot on aluminum. | Open resource |
| Al_Spot_TDA_Results.csv | CSV | Results for AM Bench challenge problems for time-dependent absorption during a stationary laser spot on aluminum. | Open resource |
| Al_Spot_TDA_Results.csv | Text | Results for AM Bench challenge problems for time-dependent absorption during a stationary laser spot on aluminum. | Open resource |
| Al_Spot_TDW_Results.csv | CSV | Results for AM Bench challenge problems for time-dependent width during a stationary laser exposure on aluminum. | Open resource |
| Al_Spot_TDW_Results.csv | Text | Results for AM Bench challenge problems for time-dependent width during a stationary laser exposure on aluminum. | Open resource |
| Absorption Uncertainty Analysis | This document contains the uncertainty analysis calculations for the absorptivity data given in this dataset. The relevant measurement equations are given along with uncertainty equations for the reflected power, absorbed power, and laser coupling efficiency. An example calculation is also presented using the "Spot on Bare Metal" data set. | Open resource | |
| Laser Beam Profile Script | Binary | This is a script for visualizing the beam profile data given in the above file. The user should adjust the "LaserPower" parameter to be equal to the value specified for the absorption data. The user also needs to input an appropriate value for the data file location. | Open resource |
| Beam Profile_5p5micron pixels_Normalized integral | XLS | Beam profile data whose integral is normalized to 1. Therefore, multiplying these data by the laser power gives the correct integrated laser power. An example Python script is given as ?Beam Profile Imaging.ipynb? This data was obtained at focal plane of laser. The data is in units of pixels and the pixel pitch is 5.5 micrometers square. | Open resource |
| Data Synchronization Example | Binary | This is a sample script for comparing raw and processed Xray images along with the absorption at a particular time. The time is selected by the user by a choice of image frame to display. | Open resource |
| NIST SRM 654b Ti64 data sheet | Composition datasheet for NIST standard reference material (SRM) 654b, a Ti-6Al-4V alloy. The samples used in this study were cut from this feedstock. Additional information found at https://www-s.nist.gov/srmors/view_detail.cfm?srm=654B | Open resource | |
| Sample Diagram | This file contains diagrams of the experimental setup and sample configuration. | Open resource | |
| Scan on Bare Metal_Calibrated Absorption Data | XLS | File containing time-dependent absorption and camera timing data. Nine columns. 1: Numerical index. 2: ?Time? ? in seconds. 3: ?InputLaser? ? Temporal profile of laser pulse. Sharp peak for first few hundred nanoseconds is an artifact and is to be ignored. 4: ?AbsoluteAbsorption? ? The calculated absolute absorbed power in units of Watts. See [1] and [4] for discussion of how this is calculated. 5: ?AbsAbsorptionUncertainty? ? Absolute expanded uncertainty in the absorbed power in units of Watts. See additional documentation for how this is calculated. 6: ?RelativeAbsorption? ? Percent absorption. 7: ?CameraTrigger? ? TTL pulse when camera was triggered to start capturing images. 8: ?FrameTrigger? ? Camera output pulse where leading edge is start of frame exposure. 9: ?FrameNumber? ? The frame number is given at the start of each frame. | Open resource |
| Scan on Bare Metal_Xray with Absorption | Unknown | An example movie made from the frames in "Scan on Bare Metal_XrayImages_processed_wAbsorption". | Open resource |
| Scan on Bare Metal_XrayImages_processed_captioned | ZIP | Processed Xray images prepared using the methods described in [3]. Time stamps are also overlayed on the images. | Open resource |
| Scan on Bare Metal_XrayImages_processed_wAbsorption | ZIP | Frames containing processed Xray images along with a time series plot of the measured laser absorption up to the time that the Xray image as captured. | Open resource |
| Scan on Bare Metal_XrayImages_Raw | ZIP | Unprocessed (raw) Xray images. | Open resource |
| Spot on Bare Metal_Calibrated Absorption Data | XLS | File containing time-dependent absorption and camera timing data. Nine columns. 1: Numerical index. 2: "Time" in seconds. 3: "InputLaser" Temporal profile of laser pulse. Sharp peak for first few hundred nanoseconds is an artifact and is to be ignored. 4: "AbsoluteAbsorption" The calculated absolute absorbed power in units of Watts. See [1] and [4] for discussion of how this is calculated. 5: "AbsAbsorptionUncertainty" Absolute expanded uncertainty in the absorbed power in units of Watts. See additional documentation for how this is calculated. 6: "RelativeAbsorption" Percent absorption. 7: "CameraTrigger" TTL pulse when camera was triggered to start capturing images. 8: "FrameTrigger" Camera output pulse where leading edge is start of frame exposure. 9: "FrameNumber" The frame number is given at the start of each frame. | Open resource |
| Spot on Bare Metal_Xray with Absorption | Unknown | An example movie made from the frames in ?Spot on Bare Metal_XrayImages_processed_wAbsorption?. | Open resource |
| Spot on Bare Metal_XrayImages_processed_captioned | ZIP | Spot on Bare Metal_XrayImages_processed_captioned | Open resource |
| Spot on Bare Metal_XrayImages_processed_wAbsorption | ZIP | Frames containing processed Xray images along with a time series plot of the measured laser absorption up to the time that the Xray image as captured. | Open resource |
| Spot on Bare Metal_XrayImages_Raw | ZIP | Unprocessed (raw) Xray images. | Open resource |