| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XI
|
| Presentation Title |
Evaluation of Residual Stresses in Isothermal Friction Stir Welded 304L Stainless Steel Plates |
| Author(s) |
Madhumanti Bhattacharyya, Thomas-Gnaupel Herold, Krishnan S. Raja, Jens Darsell, Saumyadeep Jana, Indrajit Charit |
| On-Site Speaker (Planned) |
Indrajit Charit |
| Abstract Scope |
Friction stir welding was performed on 304L SS plates to heal simulated cracks (created by electrical discharge machining) at two different tool temperatures (825 and 725°C). Both neutron diffraction and X-ray diffraction techniques were employed to measure the weld residual stresses along two orthogonal reference directions, longitudinal (σ<sub>xx</sub>) and transverse (σ<sub>yy</sub>). It was found that, at 1 mm depth from the top surface inside the stir zone (SZ), the longitudinal component was tensile in nature while the transverse component was compressive. The nature and values of the residual stress fields, and the position of the peak residual stresses were found to vary with the weld depth. The SZ of the 725°C weld exhibited higher peak stress than 825°C weld mainly due to a lack of stress relief at the lower temperature. The work is supported by US DOE Office of Nuclear Energy’s Nuclear Energy University Program. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Iron and Steel, Characterization |