| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals
|
| Presentation Title |
Hot Deformation Behavior and Processing Maps of 9Cr1Mo Rotor Steel |
| Author(s) |
Sumit Kumar, Sumeer K. Nath |
| On-Site Speaker (Planned) |
Sumit Kumar |
| Abstract Scope |
Isothermal hot compression behavior of low-carbon high-alloy 9Cr1Mo rotor steel was studied under the deformation temperature range from 850 °C-1100 °C over the strain rates of 0.001 s-1-10 s-1 up to 0.69 true strain. Artificial neural network (ANN) model was used to analyze the adiabatic temperature rise and flow stress. The activation energy, material constants and Zener-Hollomon parameter with the help of universal constitutive equation were analyzed. Critical condition parameters developed by Jonas & Poliak for the initiation of dynamic recrystallization (DRX) were applied. Material constants ‘n’ & ‘k’ were determined at each deformation condition for Avrami equation model to determine volume fraction of DRX up to 0.69 true strain. The dynamic material model (DMM) and modified dynamic material model (MDMM) (processing maps) were developed at 0.3 and 0.6 true strain, also the microstructural studies were carried out to identify desired forging parameters of present steel. |
| Proceedings Inclusion? |
Planned: |