Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725
Hydrogen embrittlement (HE) causes sudden, costly failures of metal components across a wide range of industries. Yet, despite over a century of research, the physical mechanisms of HE are too poorly understood to predict HE-induced failures with confidence. We use non-destructive, synchrotron-based...
| Main Authors: | , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Published: |
Springer Science and Business Media LLC
2021
|
| Online Access: | https://hdl.handle.net/1721.1/129584 |
| _version_ | 1826196806922403840 |
|---|---|
| author | Hanson, John Paul Bagri, Akbar Lind, Jonathan Kenesei, Peter Suter, Robert M. Gradecak, Silvija Demkowicz, Michael J. |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Hanson, John Paul Bagri, Akbar Lind, Jonathan Kenesei, Peter Suter, Robert M. Gradecak, Silvija Demkowicz, Michael J. |
| author_sort | Hanson, John Paul |
| collection | MIT |
| description | Hydrogen embrittlement (HE) causes sudden, costly failures of metal components across a wide range of industries. Yet, despite over a century of research, the physical mechanisms of HE are too poorly understood to predict HE-induced failures with confidence. We use non-destructive, synchrotron-based techniques to investigate the relationship between the crystallographic character of grain boundaries and their susceptibility to hydrogen-assisted fracture in a nickel superalloy. Our data lead us to identify a class of grain boundaries with striking resistance to hydrogen-assisted crack propagation: boundaries with low-index planes (BLIPs). BLIPs are boundaries where at least one of the neighboring grains has a low Miller index facet—{001}, {011}, or {111}—along the grain boundary plane. These boundaries deflect propagating cracks, toughening the material and improving its HE resistance. Our finding paves the way to improved predictions of HE based on the density and distribution of BLIPs in metal microstructures. |
| first_indexed | 2024-09-23T10:37:59Z |
| format | Article |
| id | mit-1721.1/129584 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:37:59Z |
| publishDate | 2021 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1295842022-09-30T21:57:00Z Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 Hanson, John Paul Bagri, Akbar Lind, Jonathan Kenesei, Peter Suter, Robert M. Gradecak, Silvija Demkowicz, Michael J. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering Hydrogen embrittlement (HE) causes sudden, costly failures of metal components across a wide range of industries. Yet, despite over a century of research, the physical mechanisms of HE are too poorly understood to predict HE-induced failures with confidence. We use non-destructive, synchrotron-based techniques to investigate the relationship between the crystallographic character of grain boundaries and their susceptibility to hydrogen-assisted fracture in a nickel superalloy. Our data lead us to identify a class of grain boundaries with striking resistance to hydrogen-assisted crack propagation: boundaries with low-index planes (BLIPs). BLIPs are boundaries where at least one of the neighboring grains has a low Miller index facet—{001}, {011}, or {111}—along the grain boundary plane. These boundaries deflect propagating cracks, toughening the material and improving its HE resistance. Our finding paves the way to improved predictions of HE based on the density and distribution of BLIPs in metal microstructures. National Science Foundation (Grant 1150862) 2021-01-27T19:42:37Z 2021-01-27T19:42:37Z 2018-08 2017-10 2019-03-01T14:25:10Z Article http://purl.org/eprint/type/JournalArticle 2041-1723 https://hdl.handle.net/1721.1/129584 Hanson, John P. et al. “Crystallographic Character of Grain Boundaries Resistant to Hydrogen-Assisted Fracture in Ni-Base Alloy 725.” Nature Communications 9, 1 (August 2018): 3386 © 2018 The Author(s) http://dx.doi.org/10.1038/s41467-018-05549-y Nature Communications Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Science and Business Media LLC Nature |
| spellingShingle | Hanson, John Paul Bagri, Akbar Lind, Jonathan Kenesei, Peter Suter, Robert M. Gradecak, Silvija Demkowicz, Michael J. Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 |
| title | Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 |
| title_full | Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 |
| title_fullStr | Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 |
| title_full_unstemmed | Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 |
| title_short | Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 |
| title_sort | crystallographic character of grain boundaries resistant to hydrogen assisted fracture in ni base alloy 725 |
| url | https://hdl.handle.net/1721.1/129584 |
| work_keys_str_mv | AT hansonjohnpaul crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 AT bagriakbar crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 AT lindjonathan crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 AT keneseipeter crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 AT suterrobertm crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 AT gradecaksilvija crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 AT demkowiczmichaelj crystallographiccharacterofgrainboundariesresistanttohydrogenassistedfractureinnibasealloy725 |