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Two and three-dimensional characterisation of localised corrosion affected by lack-of-fusion pores in 316L stainless steel produced by selective laser melting

journal contribution
posted on 2020-04-01, 00:00 authored by Majid Laleh, A E Hughes, S Yang, J Li, Wei XuWei Xu, Ian GibsonIan Gibson, Mike Yongjun TanMike Yongjun Tan
© 2019 Elsevier Ltd Localised corrosion of 316 L stainless steel (316 L SS) produced by selective laser melting (SLM) was investigated by two and three-dimensional techniques. It was revealed that porosity, which inevitably exists in the SLM-produced parts, is a critical factor determining the susceptibility to localised corrosion. Specimens containing lack-of-fusion (LOF) pores were found to be extremely susceptible to localised corrosion, as indicated by their lower breakdown potentials measured in polarisation tests. Computed tomography (CT) analysis, capable of linking the microstructure and corrosion propagation paths in three dimensions, showed the development of localised corrosion at the sites of LOF pores upon exposure to ferric chloride solution.

History

Journal

Corrosion Science

Volume

165

Issue

1

Article number

108394

Pagination

1 - 12

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0010-938X

Publication classification

C Journal article; C1 Refereed article in a scholarly journal