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| Home > Publications database > Development of in-situ Delayed Hydride Cracking tests using neutron imaging to study the H redistribution in Zr-2.5%Nb |
| Home > Publications database > Development of in-situ Delayed Hydride Cracking tests using neutron imaging to study the H redistribution in Zr-2.5%Nb |
| Journal Article | IMPULSE-2023-00242 |
; ; ; ; ;
2023
IOP Publ.
Bristol
Please use a persistent id in citations: doi:10.1088/1742-6596/2605/1/012036
Abstract: Delayed Hydride Cracking (DHC) is a failure mechanism that occurs in Zr alloysunder certain conditions of hydrogen concentration, temperature and stress gradient. In service,hydrogen produced by corrosion reaction can be incorporated in Zr alloys and if the solidsolubility is exceeded, hydrogen precipitates as zirconium hydride. The presence of a stressconcentrator, such as a crack, generates the hydrogen diffusion and precipitation to the highstress zone beginning the DHC process. In this work, in-situ DHC tests in air at 250°C wereperformed at ANTARES, the neutron imaging facility of the FRM-II reactor. Samples ofZr2.5%Nb produced from extruded tubes and pressure tubes were studied using a stress rigspecially modified to perform DHC tests in the neutron beam. H redistribution duringmechanical testing was followed in-situ by registering the changes in neutron transmission.The results were compared with the images obtained by light optical microscopy after the tests.The results highlight the capabilities of neutron imaging to analyze time-dependent Hdistribution during DHC crack growth.
Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Materials Science (2nd) ; Instrument and Method Development (2nd)
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