Paper Title:
Hydrogen Content and Microvoid Hydrogen Pressure in Steel Wall of Spherical High Pressure Vessel
  Abstract

Hydrogen in the steel wall can cause hydrogen embrittlement of the wall material and thereby change the carrying capacity of the vessel. A theoretical model of hydrogen diffusion in the steel wall of a high pressure vessel was established and the formula of hydrogen content in the steel wall was deduced. Based on the hydrogen content formula, the formula of hydrogen pressure within microvoids which naturally exist in the steel wall of a spherical pressure vessel was deduced. At last, as an example to demonstrate the meaning of solving hydrogen pressure in microvoids, by using a representative volume element (RVE) model to carry out FE numerical simulation, the effects of hydrogen pressure on equivalent mechanical properties of the wall material were studied. It is found that the higher the gas pressures are, the lower the ultimate strength, specific elongation and percentage contraction of area are, which is in good accordance with the phenomena of metal hydrogen embrittlement.

  Info
Periodical
Advanced Materials Research (Volumes 233-235)
Edited by
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
Pages
2805-2807
DOI
10.4028/www.scientific.net/AMR.233-235.2805
Citation
Y. D. Liu, Y. H. Yin, Y. Tan, "Hydrogen Content and Microvoid Hydrogen Pressure in Steel Wall of Spherical High Pressure Vessel", Advanced Materials Research, Vols. 233-235, pp. 2805-2807, 2011
Online since
May 2011
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Price
$32.00
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