| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments II
|
| Presentation Title |
Time Dependence of 600°C Post-Weld Heat Treatment on the Microstructure and Mechanical Properties of Austenitic Stainless Steel Claddings on Low Carbon Steel Via Laser-Wire Directed Energy Deposition |
| Author(s) |
Scott C. Bozeman, Lukas Daut, Brian K Bay, O Burkan Isgor, Julie D Tucker |
| On-Site Speaker (Planned) |
Scott C. Bozeman |
| Abstract Scope |
Stainless steel (SS) overlay claddings are a mechanically robust and cost-effective solution for protecting large carbon / low-alloy steel components (e.g., pressure vessels, piping, storage tanks) from corrosion. Arc welded SS overlay claddings are typically post-weld heat treated (PWHT) at ~600°C to alleviate residual stress, however carbon diffusion and carbide formation create a large mechanical property gradient at the dissimilar metal interface that may facilitate cladding failure. In this research, we fabricate austenitic SS claddings on carbon steel using laser-wire-directed energy deposition and evaluate their time-dependent (as-fabricated, 2, 10, and 48 hour) microstructural and mechanical response to 600°C PWHT using nanoindentation and tensile testing. Tensile testing, stereo digital image correlation strain measurements, and fractography reveal the as-fabricated cladding composites are strong, ductile, and show no signs of delamination. PWHT reduces strength and increases ductility, but extended heat treatment time causes failure via carbide-induced intergranular cracking in the SS cladding metal. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Iron and Steel, Mechanical Properties |