| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Solid-state Processing and Manufacturing for Extreme Environment Applications: Integrating Insights and Innovations
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| Presentation Title |
A new route for fabricating oxide dispersion strengthened (ODS) alloy cladding with friction extrusion and pilgering |
| Author(s) |
Dalong Zhang, Xiang Wang, Jens Darsell, Xiao Li, Curt Lavender, Mark Rhodes, Justin Olson, Kayla Yano, Tingkun Liu, Ramprashad Prabhakaran, Iver Anderson, Eda Aydogan, Stuart Maloy |
| On-Site Speaker (Planned) |
Dalong Zhang |
| Abstract Scope |
In our previous work, we have demonstrated successful fabrication of solid, defect free ODS alloy rods via friction extrusion of ODS alloy powder made with gas atomization reaction synthesis (GARS). Namely no need for a prolonged ball milling step or subsequent powder metallurgy steps. The ODS rods herein had fully recrystallized, equiaxial fine-grained microstructure with Y-Ti-O oxide particle density on the order of 1022/m3. Such microstructures led to Vickers hardness of 160-200 HV, indicating ease of accommodating additional cold work like pilgering. Based on these findings, we used friction extrusion to produce slightly larger ODS rods, followed by machining and drilling into “mother tubes”. The mother tubes were subsequently pilgered using a lab-scale pilger mill with hardened steel rods as mandrels. ~45% wall thickness reduction was achieved, leading to thin walled (0.55 mm) tubes with hardness of ~240 HV. Work is ongoing to optimize the microstructure and oxide particle characteristics. |
| Proceedings Inclusion? |
Planned: |