Hydrogen trapping in helium damaged metals: a theoretical approach

E. Abramov; D. Eliezer

doi:10.1007/BF00540674

Hydrogen trapping in helium damaged metals: a theoretical approach

E. Abramov, D. Eliezer

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

A model which explains the trapping of hydrogen around or near helium bubbles is presented. According to this model, hydrogen atoms are attracted toward the bubbles due to positive stresses created by the very high pressure (350 kbar) existing inside the bubbles. The extreme trapping energy of hydrogen atoms around helium bubbles has been theoretically calculated and found to be 0.71 eV atom^-1. It is shown that most of the hydrogen atoms are trapped in a very small volume located very close to the bubble surface. The total hydrogen quantity was found to be in the range of 45-76 atoms per bubble for a wide range of hydrogen atom concentration, C_∞. The good agreement between the theoretical results and data based on many experimental measurements reinforces the assumptions underlying the very basis of the suggested mechanism. The model proposed in this study can lead to better understanding of failure mechanisms.

Original language	English
Pages (from-to)	2595-2598
Number of pages	4
Journal	Journal of Materials Science
Volume	27
Issue number	10
DOIs	https://doi.org/10.1007/BF00540674
State	Published - 1 Jan 1992

ASJC Scopus subject areas

Materials Science (all)
Mechanics of Materials
Mechanical Engineering

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10.1007/BF00540674

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title = "Hydrogen trapping in helium damaged metals: a theoretical approach",

abstract = "A model which explains the trapping of hydrogen around or near helium bubbles is presented. According to this model, hydrogen atoms are attracted toward the bubbles due to positive stresses created by the very high pressure (350 kbar) existing inside the bubbles. The extreme trapping energy of hydrogen atoms around helium bubbles has been theoretically calculated and found to be 0.71 eV atom-1. It is shown that most of the hydrogen atoms are trapped in a very small volume located very close to the bubble surface. The total hydrogen quantity was found to be in the range of 45-76 atoms per bubble for a wide range of hydrogen atom concentration, C∞. The good agreement between the theoretical results and data based on many experimental measurements reinforces the assumptions underlying the very basis of the suggested mechanism. The model proposed in this study can lead to better understanding of failure mechanisms.",

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N2 - A model which explains the trapping of hydrogen around or near helium bubbles is presented. According to this model, hydrogen atoms are attracted toward the bubbles due to positive stresses created by the very high pressure (350 kbar) existing inside the bubbles. The extreme trapping energy of hydrogen atoms around helium bubbles has been theoretically calculated and found to be 0.71 eV atom-1. It is shown that most of the hydrogen atoms are trapped in a very small volume located very close to the bubble surface. The total hydrogen quantity was found to be in the range of 45-76 atoms per bubble for a wide range of hydrogen atom concentration, C∞. The good agreement between the theoretical results and data based on many experimental measurements reinforces the assumptions underlying the very basis of the suggested mechanism. The model proposed in this study can lead to better understanding of failure mechanisms.

AB - A model which explains the trapping of hydrogen around or near helium bubbles is presented. According to this model, hydrogen atoms are attracted toward the bubbles due to positive stresses created by the very high pressure (350 kbar) existing inside the bubbles. The extreme trapping energy of hydrogen atoms around helium bubbles has been theoretically calculated and found to be 0.71 eV atom-1. It is shown that most of the hydrogen atoms are trapped in a very small volume located very close to the bubble surface. The total hydrogen quantity was found to be in the range of 45-76 atoms per bubble for a wide range of hydrogen atom concentration, C∞. The good agreement between the theoretical results and data based on many experimental measurements reinforces the assumptions underlying the very basis of the suggested mechanism. The model proposed in this study can lead to better understanding of failure mechanisms.

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Hydrogen trapping in helium damaged metals: a theoretical approach

Abstract

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