Modification of mechanical properties in directed energy deposition by a static magnetic field: Experimental and theoretical analysis

Aleksandr M. Filimonov, Oleg A. Rogozin, Oleg N. Dubinin, Yulia O. Kuzminova, Anastasia A. Shibalova, Ilya V. Okulov, Iskander S. Akhatov, Stanislav A. Evlashin

Research output: Contribution to journalArticlepeer-review

Abstract

The superimposed magnetic field affects the microstructure and mechanical properties of additively manufactured metal parts. In this work, the samples were fabricated from Inconel 718 superalloy by directed energy deposition under a 0.2 T static field. The magnetohydrodynamic 1D model is proposed for the estimation of a fluid flow inside a molten pool. According to the theoretical predictions, the fluid flow is slightly decreased by an applied field. The estimated thermoelectric magnetic convection in the mushy zone is shown to be negligible to change in subgrain size, but enough to reduce the hard-to-dissolve Nb-rich phase, thereby improving the average ultimate elongation from 23% to 27%. The obtained results confirm that an external static magnetic field can modify and enhance the mechanical properties of additively manufactured materials.

Original languageEnglish
Article number5190
JournalMaterials
Volume14
Issue number18
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Directed energy deposition
  • Magnetohydrodynamics
  • Marangoni effect
  • Seebeck effect
  • Thermoelectric magnetic convection

Fingerprint

Dive into the research topics of 'Modification of mechanical properties in directed energy deposition by a static magnetic field: Experimental and theoretical analysis'. Together they form a unique fingerprint.

Cite this