Abstract
In the present work, the feasibility to repair keyhole left at 316L stainless steel friction stir welding/friction stir processing (FSW/FSP) seam by filling friction stir welding (FFSW) using consumable tools was investigated. Interface behavior and mechanical properties of 316L stainless steel FFSW joints were investigated. The results showed that significant microstructural refinement occurred around the interface of refilled keyhole due to extreme levels of plastic deformation and thermal exposure. No σ phase but few Cr carbides were formed at the refilled joint interface, which would not result in obvious corrosion resistance degradation of 316L stainless steel. Void defects formed at the bottom of the refilled keyhole and the FFSW joint fractured at the interface during the tensile test.
| Original language | English |
|---|---|
| Pages (from-to) | 577-583 |
| Number of pages | 7 |
| Journal | International Journal of Advanced Manufacturing Technology |
| Volume | 81 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 26 Oct 2015 |
Keywords
- Austenitic stainless steel
- Filling friction stir welding
- Interface
- Keyhole repairing
- Mechanical properties
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