About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
Effect of Mo on Elevated-temperature Low-cycle Fatigue Behavior of Al-Si 356 Cast Alloy |
Author(s) |
Sinan Chen, Kun Liu, X Grant Chen |
On-Site Speaker (Planned) |
Kun Liu |
Abstract Scope |
Components of diesel engines are often subjected to cyclic loading at elevated temperature during operation, which may cause their fatal fatigue failure. In this study, elevated-temperature low-cycle fatigue (LCF) tests were conducted at 300°C on Al-Si 356 cast alloys with Mo addition. Various strain amplitudes of 0.1%, 0.2%, 0.4% and 0.6% was applied. Results showed that a high volume of finer dispersoids formed with addition of Mo. Compared with the base alloy free of Mo, a higher fatigue strength but reduced plastic strain at all studied strain amplitudes was obtained in the alloy containing Mo. Smaller fatigue striation spacing was observed in Mo-containing alloy, indicating its better fatigue crack propagation resistance. However, the total LCF cycle at 300°C in the alloy with Mo was lightly decreased due to the less sustainable of crack to the final rupture. Fatigue parameters were calculated from test data for fatigue life estimation. |
Proceedings Inclusion? |
Planned: Light Metals |