About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
Presentation Title |
Aging Behavior of Advanced Martensitic Steels for Next Generation Diesel Engine Pistons |
Author(s) |
Dean Pierce, Govindarajan Muralidharan, Larry Allard, Jon Poplawsky, Ercan Cakmak, Artem Trofimov, Hsin Wang, Allen Haynes |
On-Site Speaker (Planned) |
Dean Pierce |
Abstract Scope |
Combustion temperatures and pressures in heavy duty diesel engines are continually increasing to meet next generation environmental and efficiency requirements. However, these new temperature and pressure regimes for diesel engines are imposing severe and unique demands on current piston materials. Material degradation mechanisms, such as high cycle mechanical fatigue, thermal fatigue, microstructural aging, and oxidation interact severely and are accelerated. The focus of the present work is to understand the effect of temperature, time, and composition on the microstructural evolution, aging behavior, mechanical properties, and oxidation characteristics of candidate martensitic steels for next generation piston applications at temperature from 500 to 650 °C. High resolution scanning transmission electron microscopy, atom probe tomography, x-ray diffraction, and SEM are utilized to characterize carbide size and coarsening kinetics, and oxidation behavior. The quantitative results of these studies are then used to evaluate the contribution of different mechanisms to the elevated temperature strength. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, High-Temperature Materials, Iron and Steel |