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Investigation of electrochemical post-processing procedure for Ti-6Al-4V lattice structure manufactured by direct metal laser sintering (DMLS)

  • Guoying Dong
  • Julien Marleau-Finley
  • Yaoyao Fiona ZhaoEmail author
ORIGINAL ARTICLE
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Abstract

Additive manufacturing has become very popular nowadays to create complex geometries that cannot be achieved by any other manufacturing processes. The purpose of this study is to investigate and characterize the electrochemical polishing and chemical etching methods as a post-process treatment to improve the surface finish of lattice structures made from Ti-6Al-4V manufactured by direct metal laser sintering (DMLS). A lattice sample is designed with external and internal struts to compare the influence of the post-processing on different features. The post-processing parameters are studied via the Taguchi method. This work will provide critical information on the surface and geometrical characterization as well as the post-process treatment of a Ti-6Al-4V lattice. The metrological data will be analyzed to determine how the post-process treatment affects the surface finish, considering the final roughness and geometrical integrity of lattice samples. It is found that the material removal rate was more important at the edges, specifically on the external features. It was also confirmed that the average roughness is linked to the material removal for both processes. The more material is removed from the parts, the better the surface finish. It is also found that the etching process helps the electrochemical polishing go deeper inside the geometry.

Keyword

Chemical etching Direct metal laser sintering Electrochemical polishing Lattice structure 

Notes

Acknowledgment

I thank our colleagues from McGill University and FZ Engineering Inc. who provided insight and expertise that greatly assisted the research.

Funding information

This research was supported by the MITACS funding and the FZ Engineering Inc.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • Guoying Dong
    • 1
  • Julien Marleau-Finley
    • 1
  • Yaoyao Fiona Zhao
    • 1
    Email author
  1. 1.Department of Mechanical EngineeringMcGill UniversityMontrealCanada

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