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Licensed Unlicensed Requires Authentication Published by De Gruyter December 25, 2019

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


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.

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:


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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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