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Dynamic Multicontrast X-Ray Imaging Method Applied to Additive Manufacturing

Lorenzo Massimi, Samuel J. Clark, Sebastian Marussi, Adam Doherty, Joachim Schulz, Shashidhara Marathe, Christoph Rau, Marco Endrizzi, Peter D. Lee, and Alessandro Olivo
Phys. Rev. Lett. 127, 215503 – Published 18 November 2021
Physics logo See synopsis: Three-In-One X-Ray Imaging
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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.

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  • 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)

  1. Techniques
Interdisciplinary Physics

synopsis

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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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Authors & Affiliations

Lorenzo Massimi1,*, Samuel J. Clark2,†, Sebastian Marussi2, Adam Doherty1, Joachim Schulz3,4, Shashidhara Marathe5, Christoph Rau5, Marco Endrizzi1, Peter D. Lee2, and Alessandro Olivo1

  • 1Department of Medical Physics and Biomedical Engineering, University College London, Gower St, London WC1E 6BT, United Kingdom
  • 2Department of Mechanical Engineering, University College London, Gower St, London WC1E 6BT, United Kingdom
  • 3MicroWorks GmbH, Schnetzlerstrae 9, 76137 Karlsruhe, Germany
  • 4Institute of Microstructure Technology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
  • 5Diamond Light Source, Harwell Oxford Campus, OX11 0DE Didcot, United Kingdom

  • *l.massimiphd@gmail.com
  • Present address: X-ray Science Division, Argonne National 344 Laboratory, 9700 S. Cass Avenue, Lemont, Illinois, USA.

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Issue

Vol. 127, Iss. 21 — 19 November 2021

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