Abstract
The present work quantifies the role of plastic deformation on the hydrogen-trapping behavior within the material and at the carbides. Isothermal desorption spectroscopy and thermal desorption spectroscopy (TDS) were performed on unstrained and strained alloy 600 (Ni-15Cr-8Fe) and alloy 690 (Ni-30Cr-8Fe), in order to quantify the effect of strain on the trapping energy. The results show that the M23C8 carbides in alloy 690 were stronger traps than the M7C3 carbides in alloy 600. It was further shown that cold work tended to increase the binding energy of hydrogen to the trap sites associated with grain-boundary carbides, although this effect was small.
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Symons, D.M., Young, G.A. & Scully, J.R. The effect of strain on the trapping of hydrogen at grain-boundary carbides in Ni-Cr-Fe alloys. Metall Mater Trans A 32, 369–377 (2001). https://doi.org/10.1007/s11661-001-0268-6
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DOI: https://doi.org/10.1007/s11661-001-0268-6