{"title":"Permeability, solubility and diffusivity of hydrogen in alloy 718","authors":"F. Ebling, T. Michler","doi":"10.1002/mawe.202400192","DOIUrl":null,"url":null,"abstract":"<p>The permeability, solubility, and diffusion of hydrogen in alloy 718 were examined through both, experimental results and data from existing literature. There is a notable difference between hydrogen solubilities calculated from concentration measurements and those derived from permeation measurements. Consequently, based on a synthesis of experimental and literature data, the following coefficients for hydrogen are proposed: K<sub>0</sub>=186 mol/(m<sup>3</sup> * MPa<sup>0.5</sup>) and H<sub>S</sub>=8140 J/mol for solubility, P<sub>0</sub>=1.68 * 10<sup>−4</sup> mol/(m<sup>3</sup> * MPa<sup>0,5</sup>) and H<sub>P</sub>=57974 J/mol for permeability as well as D<sub>0</sub>=9.01 * 10<sup>−7</sup> m<sup>2</sup>/s and H<sub>D</sub>=49834 J/mol for diffusivity. It is shown that these coefficients can largely be applied independently of the heat treatment of alloy 718.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 4","pages":"575-580"},"PeriodicalIF":1.2000,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202400192","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materialwissenschaft und Werkstofftechnik","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mawe.202400192","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
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Abstract
The permeability, solubility, and diffusion of hydrogen in alloy 718 were examined through both, experimental results and data from existing literature. There is a notable difference between hydrogen solubilities calculated from concentration measurements and those derived from permeation measurements. Consequently, based on a synthesis of experimental and literature data, the following coefficients for hydrogen are proposed: K0=186 mol/(m3 * MPa0.5) and HS=8140 J/mol for solubility, P0=1.68 * 10−4 mol/(m3 * MPa0,5) and HP=57974 J/mol for permeability as well as D0=9.01 * 10−7 m2/s and HD=49834 J/mol for diffusivity. It is shown that these coefficients can largely be applied independently of the heat treatment of alloy 718.
期刊介绍：
Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing.
Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline.
Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.
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