Abstract
We present a dynamic implementation of the beam-tracking x-ray imaging method providing absorption, phase, and ultrasmall angle scattering signals with microscopic resolution and high frame rate. We demonstrate the method’s ability to capture dynamic processes with 22-ms time resolution by investigating the melting of metals in laser additive manufacturing, which has so far been limited to single-modality synchrotron radiography. The simultaneous availability of three contrast channels enables earlier segmentation of droplets, tracking of powder dynamic, and estimation of unfused powder amounts, demonstrating that the method can provide additional information on melting processes.
- Received 13 April 2021
- Revised 6 July 2021
- Accepted 12 October 2021
DOI:https://doi.org/10.1103/PhysRevLett.127.215503
© 2021 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Three-In-One X-Ray Imaging
Published 18 November 2021
Researchers have developed a technique for simultaneously monitoring the attenuation, phase shift, and dark-field scattering of an x-ray beam as it passes through a melting metal powder.
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