An Approach to Additive Manufacturing of Compressor Impellers: 3D Modeling of Multilayer Laser Solid Freeform Fabrication of Nickel Alloy 625 Powder Mixed with Nano-CeO2 on AISI 4140

Document Type : Research Paper

Authors

1 Assistant Professor, department of Physics, Tafresh University

2 Department of Physics, Tafresh University

3 PhD in Photonics, FARPACO.

Abstract

Gas turbine blades, turbine shafts and centrifugal compressor impellers are often suffered by erosion and/or corrosion. By laser cladding technique, a coating layer can be deposited on the base material in order to rebuild, repair and improve anti-erosion or anti-corrosion properties of the sensitive machine parts. In this paper, a three-dimensional finite element modeling of the laser solid freeform fabrication (LSFF) process for nickel alloy 625 powder mixed with nano-CeO2 on AISI 4140 steel is examined. Using Comsol Multiphysics software and the finite element method (FEM), the heat transfer equation, moving mesh equation and stress tensor are numerically evaluated. The dynamic geometry of the molten zone is studied by a 3D moving mesh based on Arbitrary Lagrangian-Eulerian (ALE) module. The effects of preheating as well as addition of nano-CeO2 on temperature distribution and stress fields are investigated. Temporal behavior of the key characteristic features of the model and dependence of the clad height on the scanning velocity of the laser for the first, second and third layers are also studied.

Keywords

References

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History

  • Receive Date: 22 May 2018
  • Revise Date: 21 May 2019
  • Accept Date: 08 February 2020

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