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51318-11171-Exploring the Corrosion Behavior of Alloy UNS N07718 Manufactured by Additive Manufacturing Under Different Building Directions

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  • 51318-11171-Exploring the Corrosion Behavior of Alloy UNS N07718 Manufactured by Additive Manufacturing Under Different Building Directions
Picture for Exploring the Corrosion Behavior of Alloy UNS N07718 Manufactured by Additive Manufacturing Under Different Building Directions
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The main scope of this work is to explore different process configurations to understand the corrosion response of additive manufactured alloys and to suggest the parameters to be controlled for future qualification in sour environment.

Product Number: 51318-11171-SG
Author: Filippo Cappuccini / Angelo Donato / Domenico Di Pietro / Antonella Dimatteo
Publication Date: 2018
Industry: Corrosion Monitoring and Control
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Additive Manufacturing is progressively increasing its footprint in several applications from aerospace to medical and from automotive to power generation. First components, fully manufactured by 3D printing technologies are already installed in real equipment (i.e. gas turbines) and are accumulating service experience. Yet the characterization in corrosion environments has not been fully investigated and the limited available literature and testing experience, in addition to lack of process standardization, is delaying the oil companies in exploring the potentials of this innovative manufacturing process for oil & gas applications. Additive manufacturing offers advantages in overcoming shape complexity manufacturing issues and allows the design engineers to think out of the boundaries historically determined by conventional machining of production processes. This work will concentrate on precipitation hardening alloy 718 (UNS(1) N07718) produced by laser powder bed technology, exploring the influence of building parameters on corrosion performances in chloride-containing and sour solutions, also compared to wrought alloy baseline. Specimens in different building direction and final heat treatment will be compared in their mechanical properties and microstructure versus electrochemical and stress corrosion cracking behavior. The main scope of this work is to explore different process configurations to understand the corrosion response of additive manufactured alloys and to suggest the parameters to be controlled for future qualification in sour environment.

Key words: Additive, 3D printing, N07718, corrosion, stress corrosion, ripple.

Additive Manufacturing is progressively increasing its footprint in several applications from aerospace to medical and from automotive to power generation. First components, fully manufactured by 3D printing technologies are already installed in real equipment (i.e. gas turbines) and are accumulating service experience. Yet the characterization in corrosion environments has not been fully investigated and the limited available literature and testing experience, in addition to lack of process standardization, is delaying the oil companies in exploring the potentials of this innovative manufacturing process for oil & gas applications. Additive manufacturing offers advantages in overcoming shape complexity manufacturing issues and allows the design engineers to think out of the boundaries historically determined by conventional machining of production processes. This work will concentrate on precipitation hardening alloy 718 (UNS(1) N07718) produced by laser powder bed technology, exploring the influence of building parameters on corrosion performances in chloride-containing and sour solutions, also compared to wrought alloy baseline. Specimens in different building direction and final heat treatment will be compared in their mechanical properties and microstructure versus electrochemical and stress corrosion cracking behavior. The main scope of this work is to explore different process configurations to understand the corrosion response of additive manufactured alloys and to suggest the parameters to be controlled for future qualification in sour environment.

Key words: Additive, 3D printing, N07718, corrosion, stress corrosion, ripple.

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51318-11087-Corrosion Behavior of Additively Manufactured Alloy N06210 in acidic solutions

Product Number: 51318-11087-SG
Author: Yuzo DAIGO / Katsuo SUGAHARA / Syuhei OGOSHI / Kosuke KUWABARA
Publication Date: 2018
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Corrosion rates of low porosity AM S31603 and AM N06210 in several kinds of acidic solutions were similar to those of wrought alloys respectively, the corrosion rates of AM S31603 and AM N06210 became higher with increasing porosity of each specimen.
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51317--9667-Additive Manufacturing for Sour Service: an Experimental Investigation

Product Number: 51317--9667-SG
ISBN: 9667 2017 CP
Author: William Kovacs
Publication Date: 2017
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The overall goal was to determine if a set of additive manufacturing (AM) parts could comply with the testing requirements of wrought or welded materials for sour service as outlined in NACE MR0175 / ISO 15156-3:2015. Recommendations for a qualification pathway for AM parts in sour service are included.

 
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51318-11212-Rapid Screening of Additive Manufactured Specimens for Sour Testing: Orientation and Surface Effects

Product Number: 51318-11212-SG
Author: William Kovacs III / Liu Cao / Byron Mohr / Nicholas Burkardt / Zachary Berg
Publication Date: 2018
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Mechanical and electrochemical rapid screening techniques for UNS(4) S17400 (AM) material were evaluated in comparison to sour tests of the same materials. Effects of the as-deposited surface were explored, in addition to the influence of build orientation.
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