About this Abstract |
| Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
|
| Symposium
|
5th International Congress on 3D Materials Science (3DMS 2021)
|
| Presentation Title |
The Effect of 3D Microstructure on Deformation-induced Martensitic Transformation in Austenitic Fe-Cr-Ni Alloys |
| Author(s) |
Ye Tian, Ming Guan, He Liu, Robert M. Suter, Peter Kenesei, Jun-Sang Park, Todd C. Hufnagel |
| On-Site Speaker (Planned) |
Todd C. Hufnagel |
| Abstract Scope |
Deformation-induced transformation of individual grains in Fe-Cr-Ni alloys from austenite (fcc) to α'-martensite (bcc) is strongly influenced by the local stress state, which in turn is a function of the local microstructure. To investigate these effects, we have performed near-field and far-field high-energy diffraction microscopy (HEDM) to characterize the deformation-induced martensitic transformation in high-purity Fe-Cr-Ni alloys during in situ tensile loading. For the range of Fe-Cr-Ni alloys studied, martensite start () temperatures are close to room temperature, where both stress-assisted and strain-induced formation of martensite are possible during deformation. Three-dimensional (3D) in situ reconstructions were performed including austenitic substrate and newly formed α'-martensite. Both the strain tensor evolution and neighboring environment of individual austenite grains were tracked during the loading, and correlated with martensite formation. We discuss the transformation mechanism discussed in light of the stacking-fault energy of the alloys and the grain-averaged stress state. |
| Proceedings Inclusion? |
Definite: Other |