| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Joining Technologies for Automotive Lightweight Structures
|
| Presentation Title |
Microstructural and Mechanical Property Change during Friction Element Welding |
| Author(s) |
Ankit Varma, Laine Mears, Hongseok Choi, Xin Zhao |
| On-Site Speaker (Planned) |
Xin Zhao |
| Abstract Scope |
To realize the full potential of lightweight materials with high strength-to-weight ratios in improving a vehicle’s fuel economy, it is critical to develop techniques that can efficiently weld dissimilar materials. Friction element welding (FEW) has been proposed for welding highly dissimilar materials with different strengths and thicknesses. The temperature/stress evolution during the process, as well as the microstructural and mechanical property changes following welding, are, however, poorly understood. A fully coupled thermal-mechanical finite element model is developed to simulate the FEW process and predict the temperature and stress evolution during FEW. The correlation between microstructural alteration and microhardness improvement by FEW is investigated experimentally. The effects of temperature and stress on microstructural transformation are unveiled. Their influence on the transverse shear strength of the welded specimen is also elucidated. |