| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
The Effect of Prior Austenite Grain Size on Rate of Temper Embrittlement in Nickel-Chromium-Molybdenum Steels |
| Author(s) |
Aphrodite Strifas, Matthew Draper, Sreeramamurthy Ankem |
| On-Site Speaker (Planned) |
Aphrodite Strifas |
| Abstract Scope |
A fixed composition of nickel-chromium-molybdenum steel with a yield strength of 100 ksi was selected to investigate the effect of prior austenite grain size (PAGS) on the rate of temper embrittlement (TE). The material was subjected to industrial normalization and temper steps with different austenitization times and temperatures to vary the PAGS. Following these steps; the material was treated at 482°C (previously established temperature with the highest embrittlement rate) for times up to 10,000 minutes. Microstructural features such as PAGS and carbide morphologies were investigated using scanning electron microscopy (including electron backscatter diffraction) and quantified using image analysis software. Mechanical characterization was completed via tensile and Charpy V-Notch testing. The influence of PAGS on the kinetic mechanisms associated with the rate of toughness loss will be discussed. This work will show that the rates of TE between embrittlement exposure times of 500 and 10,000 minutes for various PAGS’ are similar. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |