Hydrogen Interaction with Residual Stresses in Steel Studied by Synchrotron X-Ray Diffraction

Abstract:

The residual stress state in a material has an important role in the mechanism of cracking, induced or assisted by hydrogen. In this contribution, the beamline EDDI in BESSY II instrument in Berlin was used in order to investigate the influence of hydrogen upon the residual stresses state existing in a Supermartensitic stainless steel sample. The method used for investigating the residual stresses is the “sinus square ψ” method. This method involves the usage of high energy X-ray diffraction in order to measure the residual stress state and magnitude. It was found that hydrogen presence has a significant influence upon the magnitude of the residual stresses, as its value decreases with high hydrogen content. This effect is reversible, as hydrogen desorbs from the sample the residual stress magnitude gains its initial value before hydrogen charging.

• Periodical: Materials Science Forum (Volume 772)
• Pages: 91-95
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.772.91
• Online since: November 2013
• Authors: Eitan Dabah, Thomas Kannengiesser, Dan Eliezer, Thomas Boellinghaus
• Keywords: Energy Dispersive Diffraction, Hydrogen Embrittlement, Residual Stress, Supermartensitic Steel

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