About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
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| Symposium
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Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
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| Presentation Title |
Wire Arc Additive Manufacturing of 17-4 PH Stainless Steel for Structural Components in Lock and Dam Infrastructure: Microstructural and Mechanical Performance Evaluation |
| Author(s) |
Md Naimur Rahman Antu, Shawkat Imam Shakil, Meysam Haghshenas, Joseph Lawrence |
| On-Site Speaker (Planned) |
Md Naimur Rahman Antu |
| Abstract Scope |
This study evaluates the mechanical and microstructural performance of wire arc additive manufactured (WAAM) 17-4 PH stainless steel deposited on a rolled 17-4 PH substrate for structural applications in lock and dam infrastructure. To meet design targets of 620 MPa yield strength (YS), 965 MPa ultimate tensile strength (UTS), and 18% elongation, several heat treatments were tested. The optimal condition—solutionizing at 1038°C and aging at 621°C—achieved 703±5 MPa YS, 985±5 MPa UTS, and 20% elongation across the base, interface, and WAAM regions. Fatigue testing under fully reversed loading (R = –1) showed a fatigue limit of 430 MPa at 5 million cycles. Microstructural analysis revealed a primarily martensitic matrix with reduced δ-ferrite and an average grain size of 16.59 ± 11.7 µm. Fractography indicated internal porosity and lack of fusion as key crack initiation sites. These results demonstrate the viability of WAAM 17-4 PH for durable, large-scale structural components. |