About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Fracture of Steels: New Approaches to Modeling and Experimental Characterization
|
| Presentation Title |
EBSD at Lower Accelerating Voltages for Phase Detection in Martensitic Steels |
| Author(s) |
Patrick Gregory Callahan, Simon Mason, David J Rowenhorst |
| On-Site Speaker (Planned) |
Patrick Gregory Callahan |
| Abstract Scope |
The microstructures in martensitic steels can be complex with multiple phases and nanometer scale features, making electron microscopy ideal for direct observation of those features. Electron Backscatter Diffraction (EBSD) is particularly useful in materials characterization as it can rapidly determine both phase and orientation from a single observation. Accurate quantification of phase fractions by EBSD of the submicron sized retained austenite (RA) in some of these steels remains a challenge because the electron beam interaction volume can be near the same size as the feature. This study compares measurements of RA phase fractions in a 10 wt% Ni steel determined using a conventional phosphor based EBSD detector at 10 kV and greater with measurements collected at a lower accelerating voltage of 5 kV using a direct electron based EBSD detector. The experimental observations are compared with simulations to gain insights into the analysis of small microstructural features in steels. |