About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Hydrogen Embrittlement – A Retrospective Opinion |
Author(s) |
Ian Robertson |
On-Site Speaker (Planned) |
Ian Robertson |
Abstract Scope |
The phenomenon of hydrogen embrittlement of metals has been known since the late 1800s and has been shown to occur in all but a few pure metals and their alloys. What remains in debate is the fundamental mechanism of hydrogen embrittlement with hydride-forming metals being one exception. Is the embrittlement due to hydrogen reducing the strength of metallic bonds, lowering the formation energy of defects, shielding the elastic interaction between defects, enhancing the formation of strain induced vacancies, inducing the formation of nano-hydrides at crack tips, etc? This talk will provide a critical assessment of the evidence supporting and detracting from each mechanism and will conclude with an opinion about future directions and opportunities aimed at identifying the mechanism of hydrogen embrittlement. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Environmental Effects, Characterization |