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

Majid Laleh; Anthony E. Hughes; Sam Yang; Jianli Li; Wei Xu; Ian Gibson; Mike Y. Tan

doi:10.1016/j.corsci.2019.108394

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

Majid Laleh, Anthony E. Hughes, Sam Yang, Jianli Li, Wei Xu, Ian Gibson, Mike Y. Tan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

98 Citations (Scopus)

Abstract

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.

Original language	English
Article number	108394
Journal	Corrosion science
Volume	165
DOIs	https://doi.org/10.1016/j.corsci.2019.108394
Publication status	Published - 1 Apr 2020
Externally published	Yes

Keywords

Computed tomography
Data constrained modelling
Localised corrosion
Porosity
Selective laser melting
Stainless steel

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.corsci.2019.108394

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

abstract = "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.",

keywords = "Computed tomography, Data constrained modelling, Localised corrosion, Porosity, Selective laser melting, Stainless steel",

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T1 - Two and three-dimensional characterisation of localised corrosion affected by lack-of-fusion pores in 316L stainless steel produced by selective laser melting

AU - Laleh, Majid

AU - Hughes, Anthony E.

AU - Yang, Sam

AU - Li, Jianli

AU - Xu, Wei

AU - Gibson, Ian

AU - Tan, Mike Y.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - 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.

AB - 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.

KW - Computed tomography

KW - Data constrained modelling

KW - Localised corrosion

KW - Porosity

KW - Selective laser melting

KW - Stainless steel

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SN - 0010-938X

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JO - Corrosion science

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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

Abstract

Keywords

UN SDGs

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