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Magnesium Alloy 3D Printing by Wire and Arc Additive Manufacturing (WAAM)

Published online by Cambridge University Press:  24 July 2018

David A. Martinez Holguin ,
Seungkyu Han  and
Namsoo P. Kim
David A. Martinez Holguin
Affiliation:
Metallurgical, Materials and Biomedical Engineering Department, The University of Texas at El Paso, TX, USA
Seungkyu Han
Affiliation:
Metallurgical, Materials and Biomedical Engineering Department, The University of Texas at El Paso, TX, USA
Namsoo P. Kim*
Affiliation:
Metallurgical, Materials and Biomedical Engineering Department, The University of Texas at El Paso, TX, USA
*
*Corresponding author. Tel: +1 915-747-7996; fax: +1 915-747-8036; e-mail: [email protected]
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Abstract

Mechanical properties similar to natural bone and good biocompatibility make magnesium a great option for its use as biodegradable implant material. The use of castings as fabrication technique brings inherent problems, such as segregation and void formation. Also, the architecture of the specimens created by using these techniques is limited. This study shows the implementation of WAAM for the fabrication of elements made out of AZ91D magnesium alloy (9% aluminium and 1% zinc). The results demonstrate that porosity or cracking only appears at the surface of the individual printed lines, while the central sections presents a void-less structure composed by an HCP magnesium matrix and a high density of well dispersed aluminium-zinc rich precipitates. EDS mapping confirms the presence of orthorhombic Al5Mg11Zn4 phase. Also, the relationship between the heat present in the system and the morphology of the lines is analysed.

Keywords

additive manufacturing3D printingbiomaterialMg
Type
Articles
Information
MRS Advances , Volume 3 , Issue 49: Manufacturing/Artificial Intelligence for Materials Development , 2018 , pp. 2959 - 2964
Copyright
Copyright © Materials Research Society 2018 

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