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The effect of evaporation and recoil pressure on energy loss and melt pool profile in selective electron beam melting

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Abstract

Powder bed fusion (PBF) systems are the most widely used metal additive manufacturing applications. Among these systems, selective electron beam melting (SEBM) is less common but is preferred for its fast-printing features and manufacturing high-density parts with lower residual stresses and distortion. As with other PBF systems, the predictions of temperature distribution and melt pool dimensions are highly important for this process. In this context, evaporation is also an issue that needs to be focused on due to its effect on the melt pool profile, energy loss, and manufacturing defects. In this study, the effects of evaporation and recoil pressure on the melt pool and energy loss are examined by evaluating experimental solidified melt pool profiles. An empirical recoil pressure expression is derived. A relatively simple but effective modeling approach is presented and validated with experimental results.

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Funding

The authors are very grateful to TUBITAK for financial support (Grant No: 3170014).

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Authors and Affiliations

  1. Advanced Manufacturing Technologies Research Group (AMTRG), Gazi University, Ankara, Turkey

    Mehmet Mollamahmutoglu, Oguzhan Yilmaz & Rahmi Unal

  2. Mechanical Design Technologies Department, ASELSAN Inc, EKIM Laboratory, Ankara, Turkey

    Berkay Gumus & Evren Tan

Authors
  1. Mehmet Mollamahmutoglu
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  2. Oguzhan Yilmaz
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  3. Rahmi Unal
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  4. Berkay Gumus
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  5. Evren Tan
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Contributions

All authors contributed to the study conception and design. MM: Writing-original draft, modeling, conceptualization, software, methodology, and metallography. OY: Supervision, writing-review and editing, and methodology. RU: Supervision and methodology. BG: Design and manufacturing and metallography. ET: Design and manufacturing and metallography.

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Correspondence to Mehmet Mollamahmutoglu.

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Mollamahmutoglu, M., Yilmaz, O., Unal, R. et al. The effect of evaporation and recoil pressure on energy loss and melt pool profile in selective electron beam melting. Int J Adv Manuf Technol 120, 4041–4050 (2022). https://doi.org/10.1007/s00170-022-09017-2

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