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Impacts of Friction Stir Processing on Microstructure and Corrosion Properties of DMLS-AlSi10Mg

  • Mehran RafieazadEmail author
  • Mohsen Mohammadi
  • Adrian Gerlich
  • Ali Nasiri
Conference paper
  • 704 Downloads
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Despite the already existing advantages of additively manufactured AlSi10Mg, there are still process-induced imperfections associated with the direct metal laser sintering process, such as microstructural inhomogeneity and high level of porosity. The post-printing thermal treatments have been shown to be an effective method to reduce the microstructural inhomogeneity, but unable to diminish the porosity level of the part. In this study, friction stir processing (FSP) is introduced as a practical post-printing process capable of reducing both the porosity level and microstructural inhomogeneity of the DMLS-AlSi10Mg alloy. A detailed microstructural analysis of the as-printed DMLS-AlSi10Mg alloy before and after FSP treatment utilizing optical microscopy, scanning electron microscopy, and electron backscatter diffraction was performed. To further investigate the impact of the FSP-induced microstructural modifications and porosity reduction on the corrosion performance of the alloy, anodic polarization testing was conducted on both as-printed and FSPed DMLS-AlSi10Mg alloy.

Keywords

Friction stir processing Direct metal laser sintering (DMLS) AlSi10Mg Microstructure Corrosion 

Notes

Acknowledgements

The authors wish to acknowledge the support of Natural Sciences and Engineering Research Council of Canada (NSERC) [grant number RGPIN-2017-04368], for sponsoring this work.

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Mehran Rafieazad
    • 1
    Email author
  • Mohsen Mohammadi
    • 2
  • Adrian Gerlich
    • 3
  • Ali Nasiri
    • 1
  1. 1.Faculty of Engineering and Applied ScienceMemorial University of NewfoundlandSt. John’sCanada
  2. 2.Marine Additive Manufacturing Centre of Excellence (MAMCE)University of New BrunswickFrederictonCanada
  3. 3.Centre for Advanced Materials Joining, Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooCanada

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