Preliminary Study on the Influence of an External Magnetic Field on Melt Pool Behavior in Laser Melting of 4140 Steel Using In-Situ X-Ray Imaging Academic Article uri icon


  • Abstract In laser melting processes of metallic parts, including welding and additive manufacturing, there are challenges in porosity formation and developing predictive multiphysics of the process. Surrounding a melt pool with an external magnetic field has promise in changing the Marangoni flow and reducing porosity formation. In-situ X-ray imaging enables the observation of melt pool behavior and porosity formation in real-time. This preliminary study shows that an external magnetic field can achieve both, with potential to scale up in industrial processes and to validate multiphysics models.

published proceedings

  • Journal of Micro and Nano-Manufacturing

author list (cited authors)

  • Wolff, S. J., Gould, B., Parab, N., Zhao, C., Greco, A., & Sun, T

citation count

  • 3

complete list of authors

  • Wolff, Sarah J||Gould, Benjamin||Parab, Niranjan||Zhao, Cang||Greco, Aaron||Sun, Tao

publication date

  • December 2020