About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Environmental Degradation of Additively Manufactured Alloys
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Presentation Title |
Characterization of Corrosion Behavior in Additively Manufactured Al-6061 RAM Processed by Laser Powder Bed Fusion (L-PBF) |
Author(s) |
Hamidreza T-Sarraf, Nikhilesh Chawla |
On-Site Speaker (Planned) |
Hamidreza T-Sarraf |
Abstract Scope |
The prospect of producing net shape Al-alloys via laser powder bed fusion (L-PBF) has the potential to provide cost effective components. However, L-PBF processed high strength Al-alloys, produced principally with the same compositions of the wrought alloys lead to hot tearing and undesirable mechanical properties due to interdendritic shrinkages formed during rapid solidification. Reactive additive manufacturing (RAM) technique has overcome this weakness by adding reactive particles as grain modifier into the feedstock powder. However, the influence of these particles on the corrosion performance of L-PBF processed Al-alloy is still unknown. In this work, the corrosion behavior of Al-6061 manufactured by RAM technique was studied over ten days of exposure in a 0.5 M NaCl solution. The microscopic observation and electrochemical data revealed that microstructural modifier particles acted as cathodic sites for corrosion attack. The influence of the microstructure on localized corrosion behavior and attack was characterized and will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Environmental Effects |