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Impact of fabrication method on the corrosion behavior of heat-treated nickel aluminum bronze (NAB) alloy: A comparison of laser powder bed fusion (L-PBF) and laser directed energy deposition (L-DED) techniques.

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Title: Impact of fabrication method on the corrosion behavior of heat-treated nickel aluminum bronze (NAB) alloy: A comparison of laser powder bed fusion (L-PBF) and laser directed energy deposition (L-DED) techniques.
Authors: Morshed-Behbahani, Khashayar1 (AUTHOR) kmorshed@dal.ca, Rayner, Addison J.1 (AUTHOR), Bishop, Donald Paul1 (AUTHOR), Nasiri, Ali1 (AUTHOR) ali.nasiri@dal.ca
Source: Colloids & Surfaces A: Physicochemical & Engineering Aspects. Mar2025, Vol. 708, pN.PAG-N.PAG. 1p.
Subjects: Corrosion in alloys, Aluminum bronze, Corrosion resistance, Passivity (Psychology), Aluminum analysis, Laser deposition
Abstract: The corrosion response of heat-treated C63020-NAB alloys fabricated through laser-powder bed fusion (L-PBF) and laser-directed energy deposition (L-DED) techniques was assessed in NaCl solution on surfaces parallel and perpendicular to their building direction. Microstructural analyses revealed a stronger texture formed in the L-PBF NAB, while the L-DED NAB exhibited a slightly more isotropic behavior characterized by a finer microstructure and more equiaxed grains on both surfaces. Corrosion performance analysis indicated isotropic corrosion behavior in both L-DED and L-PBF NAB, though the L-DED NAB showed marginally better corrosion resistance. The microstructural characteristics were identified as the primary factor driving the passivity and corrosion resistance of the alloy. [Display omitted] • Corrosion behavior of L-PBF and L-DED NAB evaluated in NaCl solution. • L-DED NAB showed a uniform microstructure with fewer precipitates than L-PBF NAB. • Corrosion resistance improves over time in both L-PBF and L-DED NAB. • Both L-PBF and L-DED NAB exhibit isotropic corrosion and passive behavior. • L-DED NAB demonstrates marginally superior corrosion resistance to L-PBF NAB. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The corrosion response of heat-treated C63020-NAB alloys fabricated through laser-powder bed fusion (L-PBF) and laser-directed energy deposition (L-DED) techniques was assessed in NaCl solution on surfaces parallel and perpendicular to their building direction. Microstructural analyses revealed a stronger texture formed in the L-PBF NAB, while the L-DED NAB exhibited a slightly more isotropic behavior characterized by a finer microstructure and more equiaxed grains on both surfaces. Corrosion performance analysis indicated isotropic corrosion behavior in both L-DED and L-PBF NAB, though the L-DED NAB showed marginally better corrosion resistance. The microstructural characteristics were identified as the primary factor driving the passivity and corrosion resistance of the alloy. [Display omitted] • Corrosion behavior of L-PBF and L-DED NAB evaluated in NaCl solution. • L-DED NAB showed a uniform microstructure with fewer precipitates than L-PBF NAB. • Corrosion resistance improves over time in both L-PBF and L-DED NAB. • Both L-PBF and L-DED NAB exhibit isotropic corrosion and passive behavior. • L-DED NAB demonstrates marginally superior corrosion resistance to L-PBF NAB. [ABSTRACT FROM AUTHOR]
ISSN:09277757
DOI:10.1016/j.colsurfa.2024.136069