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51314-4478-High-Temperature Oxidation Behavior of Alloy 718 Processed by Additive Manufacturing

Picture for High-Temperature Oxidation Behavior of Alloy 718 Processed by Additive Manufacturing
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Product Number: 51314-4478-SG
ISBN: 4478 2014 CP
Author: Kinga Unocic
Publication Date: 2014
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The effect of microstructure and composition on the oxidation behavior of Inconel 718 processed by addictive manufacturing is being evaluated and compared with oxidation behavior of wrought IN718. To study the role of alloy processing microstructure and composition the high temperature oxidation behavior of alloy 718 will be compared in various oxidizing (steam air with 0% and 10%H2O) environments at 650øC-800øC after exposure for 1000h. Oxidation in wet air simulates turbine combustion environments and causes net mass losses at 650ø-700øC because of the volatilization of Cr oxy-hydroxides that is not observed in ambient air testing. Initial results on wrought 718 alloy showed an increase in internal oxidation attack with increasing temperature. The internal attack appeared to be associated with rod-shaped Ni3Nb precipitates (ë-phase).Keywords: 718 high-temperature oxidation ë phase addictive manufacturingThis research was sponsored by the U.S. Department of Energy U.S. Assistant Secretary for Energy Efficiency and Renewable Energy Advanced Manufacturing Office (Combined Heat and Power) Please submit to: TEG 123X/TEG 126X/TEG 128X/TEG 270X
The effect of microstructure and composition on the oxidation behavior of Inconel 718 processed by addictive manufacturing is being evaluated and compared with oxidation behavior of wrought IN718. To study the role of alloy processing microstructure and composition the high temperature oxidation behavior of alloy 718 will be compared in various oxidizing (steam air with 0% and 10%H2O) environments at 650øC-800øC after exposure for 1000h. Oxidation in wet air simulates turbine combustion environments and causes net mass losses at 650ø-700øC because of the volatilization of Cr oxy-hydroxides that is not observed in ambient air testing. Initial results on wrought 718 alloy showed an increase in internal oxidation attack with increasing temperature. The internal attack appeared to be associated with rod-shaped Ni3Nb precipitates (ë-phase).Keywords: 718 high-temperature oxidation ë phase addictive manufacturingThis research was sponsored by the U.S. Department of Energy U.S. Assistant Secretary for Energy Efficiency and Renewable Energy Advanced Manufacturing Office (Combined Heat and Power) Please submit to: TEG 123X/TEG 126X/TEG 128X/TEG 270X
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51318-11171-Exploring the Corrosion Behavior of Alloy UNS N07718 Manufactured by Additive Manufacturing Under Different Building Directions

Product Number: 51318-11171-SG
Author: Filippo Cappuccini / Angelo Donato / Domenico Di Pietro / Antonella Dimatteo
Publication Date: 2018
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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.
Picture for Characterization of Direct Metal Laser Sintered Alloy 718 in the As-Fabricated and Heat Treated Condition
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51318-11297-Characterization of Direct Metal Laser Sintered Alloy 718 in the As-Fabricated and Heat Treated Condition

Product Number: 51318-11297-SG
Author: Robert Badrak / Arturo Delacruz / William Howie / Sergey Kolesov
Publication Date: 2018
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This paper focuses on characterizing Alloy 718 produced via the Direct Metal Laser Sintering (DMLS) process in the as-fabricated and heat treated condition.
Picture for Additive Manufacturing for Sour Service: an Experimental Investigation
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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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