| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid State Diffusion Bonding of Metals and Alloys
|
| Presentation Title |
Microstructural Evolution and Mechanical Properties of Lap-jointed Ti-6Al-4V Plates by Pin-less Friction Stir Spot Welding |
| Author(s) |
Hyojin Park, Yong Chae Lim, Hahn Choo, Suhong Zhang, Anming Hu, Scott A Rose, Zhili Feng |
| On-Site Speaker (Planned) |
Hyojin Park |
| Abstract Scope |
Ti-6Al-4V has excellent mechanical properties and corrosion resistance that will be attractive for aerospace applications. However, very limited researches have been conducted for joining of titanium alloys using a solid-state welding process. In the present work, we applied a novel pinless friction stir spot welding technique to spot join Ti-6Al-4V sheets with a lap joint configuration. Frictional heat generated underneath of flat tool diffused into the interface of two titanium sheets and finally produced solid-state bonding. Various welding parameters were applied and evolution of metallurgical bonding size at joint interface was measured from cross-sectional view. Microhardness on the welded samples were measured and correlated with microstructures. Mechanical lap shear tensile testing was conducted to assess the bonding strength of Ti-6Al-4V specimens. Finally, the boding mechanism is discussed based on solid state diffusion. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |