AMPP Store - Products tagged with 'alloy 718'

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Developing an Appropriate Heat Treatment Protocol for Additively Manufactured Alloy 718 for Oil and Gas Applications

Product Number: 51323-18793-SG

Author: M.R. Stoudt, M.E. Williams, J.S. Zuback, K.W. Moon, C.E. Campbell, C.R. Beauchamp, M. Yunovich

Publication Date: 2023

$20.00

Additive manufacturing (AM) is a transformative technology that has opened areas of design space that were previously inaccessible by enabling the production of complex, three-dimensional parts and intricate geometries that were impractical to produce via traditional manufacturing methods. However, the extreme thermo-mechanical conditions in the AM build process (e.g., cooling rates ranging from 103 K/s
to 106 K/s and repeated heating/cooling cycles) generate deleterious microstructures with high residual stresses, and extreme compositional gradients.

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Evaluation Of The KIEC Of UNS N07718 With And Without Delta Phase In Simulated Seawater With Cathodic Protection Using Double Cantilever Beam Tests

Product Number: 51321-16652-SG

Author: Adam C. Rowe; Suresh Divi

Publication Date: 2021

$20.00

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Evolution of Microstructures, Mechanical Properties, and Stress Corrosion Cracking Resistance of Alloy 718 Manufactured by LPBF and WAAM

Product Number: 51324-20706-SG

Author: Bing Han; Manuel Marya; Srinand Karuppoor

Publication Date: 2024

$40.00

Laser powder bed fusion (LPBF) is becoming a popular additive manufacturing (AM) process for oilfield components of Alloy 718. Despite attracting features, AM 718 is often uneconomical, greatly limited in size, while the build properties differ from wrought counterparts. Among AM processes, wire arc additive manufacturing (WAAM) offers a cost appeal and an improved scalability for Alloy 718. In this investigation, Alloy 718 coupons built by both LPBF and WAAM are compared for their microstructures, mechanical properties, and sulfide-stress cracking (SSC) resistance. To approach the properties of the wrought alloys, post-processes such as stress relief, hot-isostatic pressing, solution annealing and age hardening are revisited by jointly analyzing microstructures and mechanical properties. Further, slow-strain rate tests were completed to assess the SSC susceptibility of WAAM 718 relative to LPBF 718. This investigation demonstrates that LPBF 718 is capable of properties in line with its wrought counterpart, whereas much more work is needed for WAAM 718 to reach satisfactory quality and consistency.

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Expanding SCC Safe Use Limit of Alloy 718 for Sour HTHP Downhole Applications

Product Number: 51324-20928-SG

Author: L. Zhao; T. Dunne; J.X. Ren; J. Yue; P. Cheng

Publication Date: 2024

$40.00

Nickel alloy UNS N07718 (Alloy 718) is extensively used in the oil and gas industry. However, it is limited by NACE MR0175/ISO15156 which only permits use at a maximum of 200 psi (1.38 MPa) H2S partial pressure at 400°F (204°C). To expand the Stress Corrosion Cracking (SCC) safe use limit of Alloy 718, NACE TM0198 Slow Strain Rate (SSR) testing was performed first to identify an upper H2S limit (i.e., 650 psi [4.48 MPa]). NACE TM0177 C-ring testing subsequently qualified Alloy 718 at this high limit in modified NACE Level VII conditions, and also under 910 psi (6.27 MPa) H2S partial pressure in a simulated field environment (total 15 ksi [103 MPa]) based on equivalent dissolved H2S concentration. This is the highest service H2S limit reported for Alloy 718 and also evidence that validates the effectiveness of dissolved H2S concentration as new sour severity metric for Ni alloy SCC qualification.

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Hydrogen Embrittlement Resistance of Oil Patch Alloy 718 and Its Correlation to the Microstructure

Product Number: 51321-16393-SG

Author: Julia Botinha/Bodo Gehrmann/Helena Alves

Publication Date: 2021

$20.00

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Influence of the Hardening Phases on the Hydrogen Embrittlement Susceptibility of Ni-Alloys based on UNS N07718

Product Number: 51320-14667-SG

Author: Julia Botinha, Bodo Gehrmann, Helena Alves

Publication Date: 2020

$20.00

The Alloy UNS(1) N07718 is among the most used alloys in the oil and gas industry. Due to the presence of the alloying elements niobium, aluminum and titanium, this alloy is precipitation hardenable by the formation of the phases Gamma’ and Gamma’’. Although presenting excellent strength properties and good resistance in sour gas applications, this material is known to be susceptible to hydrogen embrittlement and most field failures are related to this limiting property.

The use of Alloy 718 (UNS N07718) for oil & gas applications is regulated by the API(2) 6ACRA1 standard and it is available in three different grades, the 120K, with minimum 120 ksi yield strength, the 140K, with minimum 140 ksi yield strength, and the 150K, with minimum 150 ksi yield strength. Previous studies showed that, due to the different hardening heat treatment parameters, each of the available grades presents a different precipitation behavior in terms of distribution and amount of precipitates, and the obtained microstructure is directly related to the resistance of the material to hydrogen embrittlement.

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Microstructure Characterization Of Additively Manufactured Alloy 718

Product Number: 51323-19419-SG

Author: Liu Cao, Dian Li, Sydney Fields, Yufeng Zheng

Publication Date: 2023

$20.00

Alloy UNS N07718 (hereafter abbreviated as 718) is one of the most versatile precipitation-hardened nickel-based corrosion-resistant alloys (CRAs) used for both surface and sub-sea components in oil and gas production service. API 6ACRA provides heat treatment windows and acceptance criteria for 718 in these oil and gas production environments, in which the heat treatment is intended to homogenize the microstructure and obtain the correct microstructure for targeting the desired mechanical properties. For fabricating high temperature materials via additive manufacturing (AM), alloy 718 is a primary focus due to its widespread applications in the past 60 years and excellent weldability in either age hardened or annealed condition.

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On the Additive Manufacturing of Alloy 718 for Meeting the Standard Industry Hydrogen Sulfide Requirements

Product Number: 51323-18809-SG

Author: Bing Han, Manuel Marya, Srinand Karuppoor

Publication Date: 2023

$20.00

Over the past twenty years, additive manufacturing (AM) has gradually emerged as an important commercial manufacturing technology for the production of components, particularly complex and highvalue metallic components. AM enables the layer-by-layer rapid manufacturing of near-net shapes using 3D computer-aided design data and typically minimizes raw-material wastes.

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Performance Of Additively Manufactured Alloy 718 In Sour Service

Product Number: 51322-18029-SG

Author: Liu Cao, Christopher Taylor

Publication Date: 2022

$20.00

Alloy UNS N07718 (hereafter abbreviated as 718) is one of the most versatile precipitation-hardened nickel-based corrosion-resistant alloys (CRAs) used for both surface and sub-sea components in oil and gas production service. API 6ACRA¹ provides heat treatment windows and acceptance criteria for 718 in these oil and gas production environments, in which the heat treatment is intended to obtain high strength and to minimize the formation of δ-phase at grain boundaries. As pointed out in NACE MR0175 Part 3² (Table 1), field failures of 718 components in sour service are primarily related to stress corrosion cracking (SCC) at elevated temperatures and hydrogen embrittlement in the lower temperature range. The latter is specifically called galvanically induced hydrogen stress cracking (GHSC or GIHSC), which is typically caused by atomic hydrogen uptake from galvanic corrosion or cathodic protection (CP) when 718 is used with steel components in a seawater environment. CP is normally used to protect steel component from corrosion in subsea environments.

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Susceptibility to Hydrogen Induced Stress Cracking of Alloy 718 and Alloy 725 Under Cathodic Polarization

Product Number: 51315-5597-SG

ISBN: 5597 2015 CP

Author: Gaute Stenerud

Publication Date: 2015

$20.00

A test project to examine the susceptibility of Hydrogen Induced Stress Cracking (HISC) has been executed. In this project hydrogen charged samples of Alloy 718 and Alloy 725 have been exposed under tensile stress to establish critical stress levels for initiation of HISC.

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The Effects of Additive Manufacturing on the Hydrogen Embrittlement of Alloy 718

Product Number: 51323-19358-SG

Author: W. Fassett Hickey, John H. Macha, Brendy Rincon Troconis, Thomas Dobrowolski, Wei Chen

Publication Date: 2023

$20.00

Parts produced via additive manufacturing (AM) are being adopted broadly among many industries and
used in an array of applications. AM parts are attractive to these industries for several reasons. Complex
geometries that cannot be manufactured using traditional, subtractive methods can be produced
additively.

Products tagged with 'alloy 718'

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