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Pitting and Stress Corrosion Cracking Resistance of Additively Manufactured Nickel Alloy UNS N07718 in Chloride-containing Environments

Picture for Pitting and Stress Corrosion Cracking Resistance of Additively Manufactured Nickel Alloy UNS N07718 in Chloride-containing Environments
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While the feasibility of additive manufacturing to create engineering components for the oil and gas industry has been demonstrated current research efforts focus on demonstrating the reliability of this manufacturing process for demanding service conditions. In this regard special attention has been paid to the chemical stability of additively manufactured materials in aggressive environments as one of the most critical properties in these applications. The beneficial combination of high strength excellent thermal stability and purpose-built corrosion resistance makes alloy 718 (UNS N07718) the most commonly used wrought and additively manufactured nickel alloy in the oil and gas industry. Wrought UNS N07718 has an outstanding record of field performance in demanding oil and gas applications including directional drilling tools that undergo extreme mechanical loads in corrosive drilling fluids. On the other hand limited data regarding the corrosion behavior of additively manufactured UNS N07718 in typical drilling environments has been collected so far. In this study the corrosion resistance susceptibility of selective laser melted UNS N07718 in simulated drilling environments has been investigated. Cyclic potentiodynamic polarization and slow strain rate tests were used to characterize the pitting and stress corrosion cracking resistance of the additively manufactured alloy UNS N07718 in high chloride-containing solutions at elevated temperatures.

Product Number: 51319-13359-SG
Author: Helmuth Sarmiento Klapper
Publication Date: 2019
$0.00
$20.00
$20.00
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Several mechanisms including Hydrogen-Enhanced Localised Plasticity (HELP) and Hydrogen-Enhanced De-cohesion (HEDE) have been identified as contributing to the hydrogen embrittlement susceptibility of UNS N07718, depending upon microstructural particularities in the material.
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Critical Factors Affecting the Pitting Corrosion Resistance of Additively Manufactured Ni-based Alloy in Chloride Containing Environments

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ISBN: 9345 2017 CP
Author: Helmuth Sarmiento Klapper
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Additive manufacturing can manufacture components that were previously impossible - without compromising strength, ductility and corrosion resistance. The pitting corrosion resistance of a selective laser melted Nickel alloy has been evaluated by electrochemical methods. 
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