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Age Hardenable Nickel-Based Alloy Developments and Research for New High Temperature Power Cycles Read chapter Read first chapter

2018 | OriginalPaper | Chapter

Evaluation of the Stress-Strain State in Alloy 718 After Hydrogen Charging

Authors : S. Kolesov, E. Alekseeva

Published in: Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications

Publisher: Springer International Publishing

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Abstract

The changes in the stress-strain state as a result of hydrogen saturation of Alloy 718 produced via traditional and 3D metal printing routes were studied. The stress-strain state of the material after electrochemical hydrogen charging was measured by X-ray technique using diffractometers with two power levels to obtain the information from different depths from the surface. It was found that most of the hydrogen accumulated in the thin surface layer. It was found that the microstrains and sub-microstrains changed up to 35% in a depth of ~5–30 μm as a result of the electrochemical hydrogen charging. The changes in the residual stress (macrostress) as a result of cathodic charging were not detected in the studied materials. As a result of hydrogen desorption at 200–800 °C, the stress-strain state of the investigated alloy returned to its initial state for traditionally made material. The bulk of hydrogen after cathodic charging was removed by heating to 300 °C.

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previous chapter Enhanced Strength of Inconel 718 by High Rate Severe Plastic Deformation
next chapter Experimental TTT Diagram of HAYNES 282 Alloy
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Metadata
Title
Evaluation of the Stress-Strain State in Alloy 718 After Hydrogen Charging
Authors
S. Kolesov
E. Alekseeva
Copyright Year
2018
Book
Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications

Print ISBN: 978-3-319-89479-9

Electronic ISBN: 978-3-319-89480-5

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-89480-5_36

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