About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Phase Transformations and Microstructural Evolution
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Presentation Title |
Hydrogen-induced Microstructural Transformations in an FeMnCoCr High-entropy Alloy |
Author(s) |
Maria Ronchi, Haoxue Yan, Shaolou Wei, C. Cem Tasan |
On-Site Speaker (Planned) |
Maria Ronchi |
Abstract Scope |
The microstructural effects of hydrogen (H) on high-strength alloys greatly complicate the problem of H embrittlement (HE). This challenge is especially relevant when it comes to iron-based alloys which can undergo multiple phase transformations and which exhibit transformation-induced plasticity. In this study, we investigate the impact of H on an Fe-Mn-based metastable high-entropy alloy (HEA) and the evolution of its microstructure. To this end, we employ a unique integrated scanning electron microscopy-thermal desorption spectroscopy technique. This enables us to use electron backscattering diffraction and electron channeling contrast imaging to monitor H influences on the austenite stability and HCP-martensite formation in this material, similar to that seen in stainless steels. Moreover, the introduction of H also leads to the formation of twins within the HCP-martensite. In this talk we reveal the underlying mechanisms of these transformations and explore how these insights can apply to the search for HE-resistant HEAs. |
Proceedings Inclusion? |
Planned: |