| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XI
|
| Presentation Title |
Friction Stir Welding of NiTi Shape Memory Alloy |
| Author(s) |
Parker West, Vasanth Chakravarthy Shunmugasamy, Bilal Mansoor, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Bilal Mansoor |
| Abstract Scope |
In the present work, we have utilized friction stir welding (FSW) to weld equiatomic NiTi shape memory alloy (SMA). Since FSW is a solid-state joining process, usual drawback associated with fusion joining process is eliminated. A successful joint was prepared on equiatomic NiTi SMAs using FSW and microstructure analysis showed a defect free joint along with absence of thermomechanically affected (TMAZ) and heat affected zones (HAZ) in the weld macrostructure. Transformation temperatures measured in the stir zone using differential scanning calorimetry showed very little changes when compared with base material. Vickers microhardness characterization showed consistent hardness values across the weld joint. Tensile testing of the weld coupons showed a maximum joint efficiency of 93% in martensitic phase and a joint efficiency of 84% in austenitic phase tested at elevated temperature. Results from the present work suggest than FSW can be successfully applied to join NiTi SMAs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Characterization, Joining |