Corrosion Characteristics of Laser-Engineered Net Shaping Additively-Manufactured 316L Stainless Steel

Jamie Ann Stull; Mary Ann Hill; Thomas J Lienert; Justin Tokash; Kevin R. Bohn; Daniel Edwin Hooks

doi:10.1007/s11837-018-3123-6

Corrosion Characteristics of Laser-Engineered Net Shaping Additively-Manufactured 316L Stainless Steel

Jamie Ann Stull
, Mary Ann Hill
, Thomas J Lienert
, Justin Tokash
, Kevin R. Bohn
, Daniel Edwin Hooks

Los Alamos National Laboratory

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

20 Scopus citations

Abstract

The single-loop electrochemical potentiokinetic reactivation (EPR) test was used to quantify the degree of sensitization for 316L stainless steel (SS) produced by laser-engineered net shaping (LENS^®) additive manufacturing (AM). EPR tests were also used to monitor how the sensitivity of the as-deposited and heat-treated AM material compared to wrought 316L SS. A solution-annealing heat treatment that recrystallized the material was also applied to AM-316L SS. The EPR tests showed that as-deposited AM-316L SS displayed low levels of sensitization. Heat-treated AM-316L SS demonstrated some improvements in resistance to corrosion, but overall did not perform as well as wrought 316L material. Optical micrographs of the AM-316L SS samples collected after conducting the EPR tests also showed localization in the as-deposited AM-316L SS material; however, these features were reduced after heat treatment, suggesting greater resistance to corrosion.

Original language	English
Pages (from-to)	2677-2683
Number of pages	7
Journal	JOM
Volume	70
Issue number	11
DOIs	https://doi.org/10.1007/s11837-018-3123-6
State	Published - Nov 1 2018

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title = "Corrosion Characteristics of Laser-Engineered Net Shaping Additively-Manufactured 316L Stainless Steel",

abstract = "The single-loop electrochemical potentiokinetic reactivation (EPR) test was used to quantify the degree of sensitization for 316L stainless steel (SS) produced by laser-engineered net shaping (LENS{\textregistered}) additive manufacturing (AM). EPR tests were also used to monitor how the sensitivity of the as-deposited and heat-treated AM material compared to wrought 316L SS. A solution-annealing heat treatment that recrystallized the material was also applied to AM-316L SS. The EPR tests showed that as-deposited AM-316L SS displayed low levels of sensitization. Heat-treated AM-316L SS demonstrated some improvements in resistance to corrosion, but overall did not perform as well as wrought 316L material. Optical micrographs of the AM-316L SS samples collected after conducting the EPR tests also showed localization in the as-deposited AM-316L SS material; however, these features were reduced after heat treatment, suggesting greater resistance to corrosion.",

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doi = "10.1007/s11837-018-3123-6",

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T1 - Corrosion Characteristics of Laser-Engineered Net Shaping Additively-Manufactured 316L Stainless Steel

AU - Stull, Jamie Ann

AU - Hill, Mary Ann

AU - Lienert, Thomas J

AU - Tokash, Justin

AU - Bohn, Kevin R.

AU - Hooks, Daniel Edwin

PY - 2018/11/1

Y1 - 2018/11/1

N2 - The single-loop electrochemical potentiokinetic reactivation (EPR) test was used to quantify the degree of sensitization for 316L stainless steel (SS) produced by laser-engineered net shaping (LENS®) additive manufacturing (AM). EPR tests were also used to monitor how the sensitivity of the as-deposited and heat-treated AM material compared to wrought 316L SS. A solution-annealing heat treatment that recrystallized the material was also applied to AM-316L SS. The EPR tests showed that as-deposited AM-316L SS displayed low levels of sensitization. Heat-treated AM-316L SS demonstrated some improvements in resistance to corrosion, but overall did not perform as well as wrought 316L material. Optical micrographs of the AM-316L SS samples collected after conducting the EPR tests also showed localization in the as-deposited AM-316L SS material; however, these features were reduced after heat treatment, suggesting greater resistance to corrosion.

AB - The single-loop electrochemical potentiokinetic reactivation (EPR) test was used to quantify the degree of sensitization for 316L stainless steel (SS) produced by laser-engineered net shaping (LENS®) additive manufacturing (AM). EPR tests were also used to monitor how the sensitivity of the as-deposited and heat-treated AM material compared to wrought 316L SS. A solution-annealing heat treatment that recrystallized the material was also applied to AM-316L SS. The EPR tests showed that as-deposited AM-316L SS displayed low levels of sensitization. Heat-treated AM-316L SS demonstrated some improvements in resistance to corrosion, but overall did not perform as well as wrought 316L material. Optical micrographs of the AM-316L SS samples collected after conducting the EPR tests also showed localization in the as-deposited AM-316L SS material; however, these features were reduced after heat treatment, suggesting greater resistance to corrosion.

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Corrosion Characteristics of Laser-Engineered Net Shaping Additively-Manufactured 316L Stainless Steel

Abstract

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