WIT Press


Numerical Study Of Hydrogen Attack In Creeping Vessels

Price

Free (open access)

Paper DOI

10.2495/LD960651

Volume

13

Pages

8

Published

1996

Size

745 kb

Author(s)

M.W.D. van der Burg, E. van der Giessen & V. Tvergaard

Abstract

The development of hydrogen attack in a vessel wall is analyzed using a recently developed continuum damage relation, accounting for non-uniform distributions of temperature and hydrogen pressure over the wall thickness. As a result of the competition between thermal expansion, creep, methane formation, and cavity growth, a non-uniform stress and damage state develops over the vessel wall. The influence of key parameters, like operation conditions, on failure time is indicated. 1 Introduction Hydrogen attack (HA) is a treacherous material degradation mechanism that con- trols the lifetime of many components in (petro)chemical industries (see e.g. [1]). At high temperatures and hydrogen pressures, som

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