A detailed microstructural and corrosion analysis of magnesium alloy WE43 manufactured by selective laser melting
Name
Manuscript_Additive Manufacturing.pdf
Description
Accepted version
Size
5.87 MB
Format
Adobe PDF
Checksum (MD5)
5ceacf5c178759afefa84a4b879fefc9
Author(s)
Esmaily, M
Zeng, Z
Mortazavi, AN
Gullino, A
Choudhary, S
Derra, T
Benn, F
D'Elia, F
Müther, M
Thomas, S
Date Issued
May 2020
Journal
Additive Manufacturing
Publisher
Elsevier BV
Citation
Esmaily, M. et al. "A detailed microstructural and corrosion analysis of magnesium alloy WE43 manufactured by selective laser melting." Additive Manufacturing 35 (October 2020): 101321. © 2020 Elsevier B.V.
Version
Author's final manuscript
Abstract
© 2020 Elsevier B.V. The production of magnesium alloy WE43 was achieved by selective laser melting (SLM). The alloy was investigated after SLM, hot isostatic pressing (HIP), and solutionising heat treatment. The microstructure and corrosion behaviour of the specimens were carefully characterised, whilst assessed and contrast relative to the conventionally cast alloy counterpart. The SLM prepared specimens possess a unique microstructure comprising fine grains growing with a strong [0001] texture along the building direction with a low fraction of process-induced and metallurgical defects, reaching < 0.1 %, after optimising the SLM parameters and the HIP treatment. Electrochemical measurements demonstrated that the SLM prepared WE43 is cathodically more active as compared with its cast counterpart. It is proposed that this behaviour is due to a high density of zirconium-rich oxide particles uniformly distributed throughout the alloy microstructure as well as the alterations in the chemical composition of the solid-solution matrix originating from the high cooling rates of SLM. It was also noted that the oxide particles are mainly sourced by powder. The present results suggest that the corrosion of SLM prepared Mg alloys could be greatly improved once the influence of powder characteristics is further understood and controlled.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.addma.2020.101321
