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Improving Hydrogen Embrittlement Resistance Of Precipitation Hardened Nickel-Alloys

Precipitation hardened (PH) Ni-alloys are widely used in the oil and gas industry since they provide an excellent combination of corrosion resistance and mechanical strength. Their use in the manufacture of API1 6A pressure-containing and pressure-controlling components is subject to the stringent requirements of specification API Standard 6ACRA. However, matching the requirements of API Standard 6ACRA does not preclude susceptibility of some PH Ni-alloys to hydrogen embrittlement (HE) and this in some cases has led to premature and unexpected failures of components made from such
materials.(

Product Number: 51321-16673-SG
Author: Luca Foroni, Carlo Malara
Publication Date: 2021
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$20.00
$20.00

Hydrogen embrittlement susceptibility of precipitation hardened Ni- alloys is a complex function of several factors such as chemical composition, deformation mode, grain size and grain boundary precipitation of carbides and intermetallic phases. Understanding the role of these factors is fundamental in identifying metallurgical conditions that can enhance resistance of precipitation hardened Ni-alloys to hydrogen embrittlement.
Analysis of hydrogen embrittlement data and a new test program have been carried out to further investigate the role of such factors and determine metallurgical conditions capable of improving hydrogen embrittlement resistance of UNS N09955 and UNS N07716 alloys. Results of the study are presented and discussed in this paper.

Hydrogen embrittlement susceptibility of precipitation hardened Ni- alloys is a complex function of several factors such as chemical composition, deformation mode, grain size and grain boundary precipitation of carbides and intermetallic phases. Understanding the role of these factors is fundamental in identifying metallurgical conditions that can enhance resistance of precipitation hardened Ni-alloys to hydrogen embrittlement.
Analysis of hydrogen embrittlement data and a new test program have been carried out to further investigate the role of such factors and determine metallurgical conditions capable of improving hydrogen embrittlement resistance of UNS N09955 and UNS N07716 alloys. Results of the study are presented and discussed in this paper.

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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