On the suitability of slow strain rate tensile testing for assessing hydrogen embrittlement susceptibility
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Martínez-Pañeda, E., Harris, Z., Fuentes-Alonso, S., Scully, J., & Burns, J. (2020). On the suitability of slow strain rate tensile testing for assessing hydrogen embrittlement susceptibility. Corrosion Science, 163 https://doi.org/10.1016/j.corsci.2019.108291
© 2019 Elsevier Ltd The onset of sub-critical crack growth during slow strain rate tensile testing (SSRT) is assessed through a combined experimental and modeling approach. A systematic comparison of the extent of intergranular fracture and expected hydrogen ingress suggests that hydrogen diffusion alone is insufficient to explain the intergranular fracture depths observed after SSRT experiments in a Ni–Cu superalloy. Simulations of these experiments using a new phase field formulation indicate that crack initiation occurs as low as 40% of the time to failure. The implications of such sub-critical crack growth on the validity and interpretation of SSRT metrics are then explored.
External DOI: https://doi.org/10.1016/j.corsci.2019.108291
This record's URL: https://www.repository.cam.ac.uk/handle/1810/300198
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