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Re-solidification dynamics and microstructural analysis of laser welded aluminium

Paper presented at the Symposium “Tomographic and Radiographic Imaging with Synchrotron X-rays and Neutrons” of the MSE 2018, 26–28 September 2018, Darmstadt, Germany
  • B. Meylan , T. Le-Quang , M.P. Olbinado , A. Rack , S.A. Shevchik and K. Wasmer
Published/Copyright: December 25, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 111 Issue 1

Abstract

In this work, we investigated the re-solidification dynamics and microstructure of aluminium AA5005 welded by fibre laser. The re-solidification process was visualized by high-speed X-ray imaging at the European Synchrotron Radiation Facility (ESRF, Grenoble, France). The final microstructure was studied by electron backscatter diffraction. The experiments were performed in both conduction and keyhole weld regimes. The results show that fine and equiaxed structure is obtained for conduction welding due to very high cooling rate. Keyhole welding also shows similar structure at the beginning of re-solidification, followed by a columnar microstructure.

Keywords: Laser welding; X-ray imaging; Microstructure
∗ Correspondence address, Dr. Kilian Wasmer, Laboratory for Advanced Materials Processing (LAMP), Swiss Federal Laboratories for Materials Science and Technology (Empa), Feuerwerkerstrasse 39, 3603 Thun, Switzerland, Tel.: +41587656271, Fax: +41587656990, E-mail: , Web: https://www.empa.ch/web/s204/kilian-wasmer

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Received: 2018-12-15
Accepted: 2019-06-27
Published Online: 2019-12-25
Published in Print: 2020-01-09

© 2020, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111838
Keywords for this article
Laser welding; X-ray imaging; Microstructure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Tomography and radiography using hard X-rays and neutrons: shedding light on materials properties and engineering devices
  5. Original Contributions
  6. In-situ synchrotron investigation of the phases- and their morphology-development in Mg–Nd–Zn alloys
  7. Observation of side arm splitting studied by high resolution X-ray radiography
  8. Re-solidification dynamics and microstructural analysis of laser welded aluminium
  9. Determination of damage mechanisms and damage evolution in fiber metal laminates containing friction stir welded thin foils
  10. Characterization of aluminum alloy microstructures by means of synchrotron X-ray micro-tomography – a simple toolchain for extracting quantitative 3D morphological features
  11. Investigation of the 3D hydrogen distribution in zirconium alloys by means of neutron tomography
  12. Effect of laser power on roughness and porosity in laser powder bed fusion of stainless steel 316L alloys measured by X-ray tomography
  13. Microstructure of polymer-imprinted metal–organic frameworks determined by absorption edge tomography
  14. 3d tomography analysis of the packing structure of spherical particles in slender prismatic containers
  15. Microstructure and texture contributing to damage resistance of the anosteocytic hinge-bone in the cleithrum of Esox lucius
  16. Time-resolved phase-contrast microtomographic imaging of two-phase solid–liquid flow through porous media
  17. People
  18. In Memoriam Prof. Dr. phil. Dr. techn. h. c. mult. Hellmut F. Fischmeister (1927–2019)
  19. DGM News
  20. DGM News
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