| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals
|
| Presentation Title |
Revealing the Microstructural and Defects Evolution Mechanisms of Aluminum Alloys at Freezing Range by Multiscale Characterization, Synchrotron X-ray Tomography, and CALPHAD Approaches |
| Author(s) |
Te-Cheng Su, Kai-Yu Liang, Ling-En Yao, Hao-Chuan Huang, Mien-Chung Chen, Sheng-Long Lee, Pei-Tzu Lee, Ying-Shuo Tseng, Gung-Chian Yin |
| On-Site Speaker (Planned) |
Te-Cheng Su |
| Abstract Scope |
Manufacturing most high-performance aluminum alloy components involves solidification, thermomechanical treatment, and high-temperature heat treatment processes. The formation and evolution of primary aluminum grains, secondary phases, and defects at semi-solid temperatures significantly influence in-service performance or subsequent processing. This study uses several in-house microstructural characterization instruments, emerging non-destructive synchrotron X-ray tomography, and the CALPHAD method to investigate how alloy composition and processing conditions affect microstructural development. We will demonstrate how this combined approach can elucidate (i) macrosegregation and dynamic recrystallization induced by semi-solid compression deformation in cast Al-Cu alloys with varying Cu content, and (ii) hot-tearing defects and intermetallics distributions in wrought aluminum alloys (5083, 6061, and 7075) where the tensile stress is induced by a constrained thermal contraction casting device. Finally, we will discuss how those findings up to the present inspire ongoing research and development efforts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Solidification, Characterization |