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Build-up strategies for temperature control using laser metal deposition for additive manufacturing

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Abstract

The track geometry created with laser metal deposition (LMD) is influenced by various parameters. In this case, the laser power has an influence on the width of the track because of an increasing energy input. A larger melt pool is caused by a rising temperature. In the case of a longer welding process, there is also a rise in temperature, resulting in a change of the track geometry. This paper deals with the temperature profiles of different zigzag strategies and spiral strategies for additive manufacturing. A two-color pyrometer is used for temperature measurement on the component surface near the melt pool. Thermocouples measure the temperatures in deeper regions of a component. The welds are located in the center and in the edge area on a test part to investigate the temperature evolution under different boundary conditions. The experiments are carried out on substrates made from mild steel 1.0038 and with the filler material 316L. The investigations show an influence on the temperature evolution by the travel path strategy as well as the position on the part. This shows the necessity for the development and selection of build-up strategies for different part geometries in additive manufacturing by LMD.

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Acknowledgments

The authors would like to acknowledge the Federal Ministry of Education and Research (BMBF) for funding the research by their support program Wachstumskern Potenzial and the Federal Institute for Materials Research and Testing for support.

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Authors and Affiliations

  1. Fraunhofer Institute for Production Systems and Design Technology, Pascalstraße 8-9, 10587, Berlin, Germany

    Torsten Petrat, Benjamin Graf, Andrey Gumenyuk & Michael Rethmeier

  2. Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205, Berlin, Germany

    René Winterkorn, Andrey Gumenyuk & Michael Rethmeier

Authors
  1. Torsten Petrat
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  2. René Winterkorn
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  3. Benjamin Graf
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  4. Andrey Gumenyuk
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  5. Michael Rethmeier
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Corresponding author

Correspondence to Torsten Petrat.

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This article is part of the collection Welding, Additive Manufacturing and Associated NDT

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Petrat, T., Winterkorn, R., Graf, B. et al. Build-up strategies for temperature control using laser metal deposition for additive manufacturing. Weld World 62, 1073–1081 (2018). https://doi.org/10.1007/s40194-018-0604-8

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  • DOI: https://doi.org/10.1007/s40194-018-0604-8

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