Additively Manufactured (AM) Alloy UNS(1) N07718, specifically using Laser Powder Bed Fusion (LPBF), has been increasingly adopted for components in oilfield applications. However, there is uncertainty of the differences in properties between AM (interchangeable with LPBF herein) 718 and wrought oilfield API(2) 6ACRA 718 material used in sour or hydrogen-generating conditions. Recent literature has shown promising results in mechanical properties and sour performance for AM 718, but certain technology gaps persist. This paper shows results of mechanical and corrosion testing of AM 718 after API 120K solution and age hardening heat treatment. Equivalence to wrought API 6ACRA 718 120K was achieved in mechanical properties and corrosion performance in sulfide stress cracking (SSC) and hydrogen induced stress cracking (HISC) tests.

Subject
Hardening, Environmental cracking, Test methods, Microstructure, Gauges, Charpy impact test, Mechanical properties, Impact toughness, Heat, Powders, Oilfields, Heat treatment, Wrought metals
Keywords:
UNS N07718, Additive Manufacturing, Laser Powder Bed Fusion, Slow Strain Rate Test, Hydrogen Sulfide, Hydrogen Embrittlement, Mechanical Properties
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2023
Baker Hughes Oilfield Operations LLC
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