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Comparison Of Hydrogen Embrittlement Testing Methods Of Alloy 718

Picture for Comparison Of Hydrogen Embrittlement Testing Methods Of Alloy 718
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Product Number: 51321-16821-SG
Author: Brian Kagay; Stevew Coryell; Kip Findlet; Steve McCoy
Publication Date: 2021
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Picture for Hydrogen Embrittlement Resistance of Oil Patch Alloy 718 and Its Correlation to the Microstructure
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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
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Picture for Hydrogen Embrittlement of High Strength Precipitation Hardenable Nickel Alloys
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Hydrogen Embrittlement of High Strength Precipitation Hardenable Nickel Alloys

Product Number: 51319-13161-SG
Author: Michael Dodge
Publication Date: 2019
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The high strength and corrosion resistance of nickel-chromium alloys such as Alloy 718 and nickel-iron-chromium alloys such as Alloys 945 and 945X make them particularly good candidates for use in demanding environments in the upstream oil and gas industry. These materials generally perform well where resistance to sulphide stress cracking and chloride stress corrosion cracking is required. However whilst these alloys are considered ‘NACE compliant' environmentally-assisted failures can still occur.It is generally accepted that for hydrogen cracks to initiate there must be a critical combination of stress susceptible microstructure and hydrogen concentration. In this project the effect of microstructure is explored by heat treating Alloy 718 945 and 945X to standard and non-standard conditions. Tensile specimens were slow-strain-rate-tested in air and under CP to explore sensitivity to hydrogen embrittlement. Finally the effect of a severe stress concentration in the form of a sharp notch was used to determine whether there is an enhanced susceptibility to hydrogen embrittlement due to the presence of local stress raisers. The results are compared with tests undertaken by other authors under various hydrogen-charging conditions.
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51314-3948-Hydrogen Embrittlement Susceptibility of Precipitation Hardened Ni-Alloys

Product Number: 51314-3948-SG
ISBN: 3948 2014 CP
Author: Carlo Malara
Publication Date: 2014
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