|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Hume-Rothery Award Symposium: Alloy Phase Chemistry at the Atomic Level - Opportunities and Challenges
||Quantification of Hydrogen using Atom Probe Tomography
||Daniel Haley, Yi-Sheng Chen, Paul Bagot, Michael Moody
|On-Site Speaker (Planned)
Nanoscale characterisation of hydrogen (H) is traditionally a challenging problem in materials science, but is a high priority problem. H embrittlement is associated with materials failure in commonly used metallic alloys, such as high-strength steels. H is often present at low concentrations in such materials, and thus any H signal is difficult to separate from the host matrix when using electron, neutron or X-ray radiation based characterisation methods. Subsequently, many normally valuable techniques are of little utility, limiting the ability of researchers to quantify the role of H in such embrittlement phenomena. Atom probe tomography, in conjunction with isotopic loading, has been shown to be a viable method for identification of H, albeit with previously strong limitations on data quality. We demonstrate new experimental methods to reliably detect hydrogen in metallic alloys, such as nano-precipitated ferritic steels, with a view to robust hydrogen quantification in three dimensions.
||Planned: Supplemental Proceedings volume