About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Seeing is Believing -- Understanding Environmental Degradation and Mechanical Response Using Advanced Characterization Techniques: An SMD Symposium in Honor of Ian M. Robertson
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Presentation Title |
Liquid Metal Embrittlement: Mechanisms at Small Scales |
Author(s) |
Thierry Auger |
On-Site Speaker (Planned) |
Thierry Auger |
Abstract Scope |
Liquid metal embrittlement (LME) is a surface adsorption induced brittle fracture phenomenon that is still not well understood phenomenologically in spite of its technological importance and its intrinsic interest. Recent results on LME crack path investigations will be presented, mostly with LME of austenitic steels, at sub-micron resolution allowed by advanced combined FIB/TEM techniques that show that the correct inclusion of plastically induced microstructural changes are essential in the clear identification of the fracture mode of several LME cases. It can be shown that the phenomenology of LME is therefore essentially an interfacial fracture phenomenon in the case of steels, a conclusion that SEM observations alone does not allow to reach.
This enables first to derive metallurgical strategies to mitigate LME with austenitic steels.
Then, a modelling strategy for LME based on the ductile to brittle transition at the grain boundary is proposed as a step towards a predictive framework. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Phase Transformations, Modeling and Simulation |