A Study on the Effects of the Use of Gas or Water Atomized AISI 316L Steel Powder on the Corrosion Resistance of Laser Deposited Material

Water atomized and gas atomized powders are commonly used in 3D laser manufacturing. Both types of AISI 316L stainless steel powders are available which differ in their manganese content. This is due to specific procedures related to the two different atomization process. The amount of manganese in...

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Bibliographic Details
Published inPhysics procedia Vol. 83; pp. 606 - 612
Main Authors Tobar, M.J., Amado, J.M., Montero, J., Yáñez, A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2016
Subjects
AISI 316L
gas atomized
laser metal deposition
water atomized
water atomized
AISI 316L
laser metal deposition
gas atomized
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Summary:Water atomized and gas atomized powders are commonly used in 3D laser manufacturing. Both types of AISI 316L stainless steel powders are available which differ in their manganese content. This is due to specific procedures related to the two different atomization process. The amount of manganese in the laser processed part might have important implications in its corrosion resistance. It could lead to the formation of manganese sulfides (MnS) which are known to be initiation sites for pitting corrosion. In this work, corrosion performance of laser deposited 316L steel using gas and atomized powders is compared by means of potentiodynamic polarization tests in 0.35%wt. NaCL solution. Worse performance of the gas atomized samples is observed as with respect to the water atomized ones in terms of polarization resistance, corrosion rate and pitting susceptibility.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2016.08.063