On the role of the powder stream on the heat and fluid flow conditions during Directed Energy Deposition of maraging steel - Multiphysics modelling and experimental validation

2021 ◽  
pp. 102021
Author(s):  
Mohamad Bayat ◽  
Venkata K. Nadimpalli ◽  
Francesco G. Biondani ◽  
Sina Jafarzadeh ◽  
Jesper Thorborg ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Maraging Steel ◽  
Energy Deposition ◽  
Experimental Validation ◽  
Flow Conditions ◽  
Directed Energy Deposition ◽  
Multiphysics Modelling ◽  
Directed Energy ◽  
Heat And Fluid Flow

Towards controlling intrinsic heat treatment of maraging steel during laser directed energy deposition

2021 ◽  
Vol 201 ◽  
pp. 113973
Author(s):  
Sasan Amirabdollahian ◽  
Faraz Deirmina ◽  
Luke Harris ◽  
Raveendra Siriki ◽  
Massimo Pellizzari ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Maraging Steel ◽  
Energy Deposition ◽  
Directed Energy Deposition ◽  
Directed Energy

The role of Directed Energy Deposition atmosphere mode on the microstructure and mechanical properties of 316L samples

2020 ◽  
Vol 34 ◽  
pp. 101274 ◽  
Author(s):  
Alberta Aversa ◽  
Abdollah Saboori ◽  
Erica Librera ◽  
Michele de Chirico ◽  
Sara Biamino ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Deposition ◽  
Directed Energy Deposition ◽  
Microstructure And Mechanical Properties ◽  
Directed Energy

scholarly journals Modification of Mechanical Properties in Directed Energy Deposition by a Static Magnetic Field: Experimental and Theoretical Analysis

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5190
Author(s):  
Aleksandr M. Filimonov ◽  
Oleg A. Rogozin ◽  
Oleg N. Dubinin ◽  
Yulia O. Kuzminova ◽  
Anastasia A. Shibalova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Fluid Flow ◽  
Static Magnetic Field ◽  
Energy Deposition ◽  
Subgrain Size ◽  
Static Field ◽  
Directed Energy Deposition ◽  
Theoretical Predictions ◽  
Directed Energy

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.

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