| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
|
Solid-state Processing and Manufacturing for Extreme Environment Applications: Integrating Insights and Innovations
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| Presentation Title |
Dissimilar metal joint by hot isostatic pressing (HIP) – design, optimization, and properties
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| Author(s) |
Evan Alexander McDermott, Chenglu Tang, Victor Samarov, Xiaoyuan Lou |
| On-Site Speaker (Planned) |
Evan Alexander McDermott |
| Abstract Scope |
We conducted a comprehensive study to develop hot isostatic pressing (HIP) technology to join SA508 ferritic low alloy steel to 316L austenitic stainless steel. The mission is to simplify the dissimilar metal welds that are traditionally made by complex arc-welding configuration and integrate it into a powder metallurgy-HIP process to construct multi-material nuclear structural components. Several HIP joint configurations are designed and evaluated, including direct transition, functionally-graded transition, and Ni alloy transition. Two main metallurgical issues impact the fracture toughness. Intergranular carbide formation is always present across dissimilar metal interface due to inter-diffusion between high-carbon low alloy steel to low-carbon austenitic alloys. Prior particle boundary (PPB) oxides, at very low level, can also affect the HIP consolidation of Ni alloy transition. Innovative HIP joint configurations and a vacuum annealing powder de-oxygenation process were developed for these metallurgical issues. The process-structure-property relationship of HIP dissimilar metal joining will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Powder Materials, |