About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Thermomechanical Fatigue Behavior and Microstructure of Casting Aluminum Alloy used for Engine Components |
| Author(s) |
Yi Liu, Qigui Wang, Jason Coryell |
| On-Site Speaker (Planned) |
Yi Liu |
| Abstract Scope |
Casting aluminum alloy used for engine cylinder head and block experiences thermomechanical fatigue (TMF) condition in engine operation. Due to the temperature variation in engine operation, geometry limitation and assembling condition, thermal expansion is generated and converted to mechanical strain which is accumulated during entire service process. To better understand the TMF behavior of aluminum alloy, typical fatigue experiments at elevated temperatures are conducted. Microstructure investigation using scanning electron microscope (SEM) with electron backscattered diffraction (EBSD) indicates that, in the area where plastic strain is accumulated, grain refinement is observed by electron channeling contrast (ECC). EBSD study further reveals that most of the grains are sub-grains. Together with the fatigue experiment, more detailed discussion will be presented. |