After an era of prototyping, the additive manufacturing (AM) processes are currently passing through an industrialization period, when the production of real parts and complex field-applicable components is beginning to take part in the industry. Together with this fast development, the need to compare and evaluate the properties of additive manufactured products arises.

Among the most used wrought and additively manufactured nickel alloys in the oil & gas industry is the Alloy UNS(1) N07718, a precipitation hardening nickel-chromium-iron alloy enriched with niobium, molybdenum, titanium and aluminum, which confer to the material excellent mechanical properties combined with satisfactory corrosion resistance. Despite the significant application of this material, limited information is available on the literature regarding the properties achieved by the material on heat-treated printed parts.

In this context, the aim of these studies is to develop an optimized heat treatment for printed parts of Alloy UNS N07718 with chemical composition in accordance to the API(2) 6ACRA1, printed in a SLM(3) machine and to characterize the properties obtained by the manufacturing process to get them compared to available data in the literature and to standard forged bars.

Subject
Buildings, Test methods, Materials, Microstructure, Nickel based alloys, Metallic structures, Additive manufacturing, Heat, Hardness, Titanium alloys, Alloys, Heat treatment, Wrought metals
Keywords:
UNS N07718, Additive Manufacturing, SLM, 3D printing, Mechanical Characterization
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2021
Association for Materials Protection and Performance (AMPP)
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