About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Influence of Interlayer Mechanical Work on Microstructure and Mechanical Performance of Super Duplex Stainless Steel Deposited Using Wire Direct Energy Deposition Process |
Author(s) |
Paul Jean, Mathieu, Marie Poulain, Jun Wang, Salima Bouvier, Yao Lu, Navid Niknafsabrbekooh, Serhiy Budnyk, Aleksandra Gavrilovic-Wohlmuther, Stewart Williams |
On-Site Speaker (Planned) |
Paul Jean, Mathieu, Marie Poulain |
Abstract Scope |
Super Duplex Stainless Steels (SDSS) manufactured by Wire Direct Energy Deposition (WDED) often exhibit typical course columnar grain structures and undesirable phase balance, leading to anisotropy and detrimental mechanical performance. In this investigation, interlayer mechanical works, including High-Pressure Rolling (HPR) and Machine Hammer Peening (MHP), were applied during the WDED process of SDSS. Three single-pass walls were deposited using plasma transferred arc WDED process with different interlayer conditions: no interlayer deformation (control group); interlayer HPR with force of 75 kN; interlayer MHP with a frequency of 36 Hz and energy per impact of 6 J. Interlayer mechanical work changes the microstructure from coarse columnar to fine equiaxed. Interlayer mechanical work resulted in austenite grains dispersion and columnar ferrite grains fragmentation. Despite this, there was only a minor impact on the overall phase balance.These findings demonstrate the benefits of interlayer mechanical work in the WDED process of SDSS. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |