| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
| Presentation Title |
Microstructure and Corrosion Behavior of 309L Stainless Steel Clad onto Carbon Steel Using Wire-fed Directed Energy Deposition |
| Author(s) |
Scott C. Bozeman, O. Burkan Isgor, Julie D. Tucker |
| On-Site Speaker (Planned) |
Scott C. Bozeman |
| Abstract Scope |
This work uses a wire-fed directed energy deposition (DED) additive manufacturing technique to apply relatively thin (~0.5 mm) 309L stainless steel claddings onto 1018 carbon steel substrates to increase corrosion resistance and save material cost. First, we determine the impacts of processing parameters (laser power, travel speed, wire feed, stepover, and cover gas) on clad morphology, microstructure, and metallurgical bonding. Parameter sets free from cracks, pores, and inclusions are then down-selected for further material testing. Chemical composition and hardness profiles are measured across the clad-substrate interface. The claddings are electrochemically tested in boric acid electrolytes to simulate corrosion in nuclear power systems. Localized corrosion testing at the clad-substrate interface is performed to assess galvanic corrosion of the dissimilar metal couple. The electrochemical behavior is connected to the interfacial composition gradients and the unique microstructures formed during cladding. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Surface Modification and Coatings, Iron and Steel |