|About this Abstract
||Materials Science & Technology 2020
||High Entropy Materials: Concentrated Solid Solution, Intermetallics, Ceramics, Functional Materials and Beyond
||Beyond Mechanical Metastability in FeMnCoCr?
||Haoxue Yan, Maria Ronchi, Shaolou Wei, C. Cem Tasan
|On-Site Speaker (Planned)
||C. Cem Tasan
Hydrogen embrittlement is one of the most significant challenges limiting the use of high-strength alloys, especially those which benefit from transformation-induced plasticity (TRIP) effect. In this study, we investigate the effect of hydrogen on austenite stability in Fe-Mn based metastable high entropy alloys, by utilizing a home-developed scanning electron microscopy – thermal desorption spectroscopy (SEM-TDS) technique. We demonstrate that the introduction of hydrogen in these alloys can influence not only austenite stability, but also extension twin formation within the strain-induced HCP-martensite. By analyzing these alloys with integrated SEM/EBSD and crystallographic analyses, we reveal the underlying twinning micro-mechanisms. In the talk we will also discuss the exploration of such effects to create feasible pathways to extend the property improvement limits of classical TRIP assisted alloys.