Elucidating the contribution of mobile hydrogen-deformation interactions to hydrogen-induced intergranular cracking in polycrystalline nickel
Abstract
Uniaxial mechanical testing conducted at room temperature (RT) and 77 K on hydrogen (H)-exposed nickel was coupled with targeted microscopy to evaluate the influence of deformation temperature, and therefore mobile H-deformation interactions, on intergranular cracking in nickel. Results from interrupted tensile tests conducted at cryogenic temperatures (77 K), where mobile H-deformation interactions are effectively precluded, and RT, where mobile H-deformation interactions are active, indicate that mobile H-deformation interactions are not an intrinsic requirement for H-induced intergranular fracture. Moreover, an evaluation of the true strain for intergranular microcrack initiation for testing conducted at RT and 77 K suggests that H which is segregated to grain boundaries prior to the onset of straining dominates the H-induced fracture process for the prescribed H concentration of 4000 appm. Lastly, recent experiments suggesting that H-induced fracture is predominately driven by mobile H-deformation interactions, as well as the increased susceptibility of coherent twin boundaries to H-induced crack initiation, are re-examined in light of these new results.
- Authors:
-
[1];
- Univ. of Virginia, Charlottesville, VA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- OxMet Technologies, Oxford (United Kingdom)
- Southwest Research Institute, San Antonio, TX (United States); Kyushu Univ., Fukuoka (Japan)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1465388
- Alternate Identifier(s):
- OSTI ID: 1703711
- Report Number(s):
- SAND-2018-8650J
Journal ID: ISSN 1359-6454; 666958
- Grant/Contract Number:
- AC04-94AL85000; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Acta Materialia
- Additional Journal Information:
- Journal Volume: 158; Journal Issue: C; Journal ID: ISSN 1359-6454
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Intergranular failure; Nickel; Hydrogen embrittlement; Dislocations; Grain boundaries
Citation Formats
Harris, Zachary D., Lawrence, Samantha K., Medlin, Douglas L., Guetard, Gael, Burns, James T., and Somerday, Brian P. Elucidating the contribution of mobile hydrogen-deformation interactions to hydrogen-induced intergranular cracking in polycrystalline nickel. United States: N. p., 2018.
Web. doi:10.1016/j.actamat.2018.07.043.
Harris, Zachary D., Lawrence, Samantha K., Medlin, Douglas L., Guetard, Gael, Burns, James T., & Somerday, Brian P. Elucidating the contribution of mobile hydrogen-deformation interactions to hydrogen-induced intergranular cracking in polycrystalline nickel. United States. https://doi.org/10.1016/j.actamat.2018.07.043
Harris, Zachary D., Lawrence, Samantha K., Medlin, Douglas L., Guetard, Gael, Burns, James T., and Somerday, Brian P. Fri .
"Elucidating the contribution of mobile hydrogen-deformation interactions to hydrogen-induced intergranular cracking in polycrystalline nickel". United States. https://doi.org/10.1016/j.actamat.2018.07.043. https://www.osti.gov/servlets/purl/1465388.
@article{osti_1465388,
title = {Elucidating the contribution of mobile hydrogen-deformation interactions to hydrogen-induced intergranular cracking in polycrystalline nickel},
author = {Harris, Zachary D. and Lawrence, Samantha K. and Medlin, Douglas L. and Guetard, Gael and Burns, James T. and Somerday, Brian P.},
abstractNote = {Uniaxial mechanical testing conducted at room temperature (RT) and 77 K on hydrogen (H)-exposed nickel was coupled with targeted microscopy to evaluate the influence of deformation temperature, and therefore mobile H-deformation interactions, on intergranular cracking in nickel. Results from interrupted tensile tests conducted at cryogenic temperatures (77 K), where mobile H-deformation interactions are effectively precluded, and RT, where mobile H-deformation interactions are active, indicate that mobile H-deformation interactions are not an intrinsic requirement for H-induced intergranular fracture. Moreover, an evaluation of the true strain for intergranular microcrack initiation for testing conducted at RT and 77 K suggests that H which is segregated to grain boundaries prior to the onset of straining dominates the H-induced fracture process for the prescribed H concentration of 4000 appm. Lastly, recent experiments suggesting that H-induced fracture is predominately driven by mobile H-deformation interactions, as well as the increased susceptibility of coherent twin boundaries to H-induced crack initiation, are re-examined in light of these new results.},
doi = {10.1016/j.actamat.2018.07.043},
journal = {Acta Materialia},
number = C,
volume = 158,
place = {United States},
year = {Fri Jul 20 00:00:00 EDT 2018},
month = {Fri Jul 20 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
Multiscale analysis of hydrogen-induced softening in f.c.c. nickel single crystals oriented for multiple-slips: elastic screening effect
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