| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Evaluation of localized creep deformation and interface characteristics of innovative P91&304H graded composite transition joint |
| Author(s) |
Yuying Wen, Ting Sun, Shanshan Hu , Zhili Feng, Haiyang Qian, Xingbo Liu |
| On-Site Speaker (Planned) |
Yuying Wen |
| Abstract Scope |
An additively manufactured graded composite transition joint (AM-GCTJ) of P91 and 304 has been developed to mitigate premature failures observed in dissimilar metal welds such as P91/304. This study aims to evaluate localized heterogeneous creep deformation using spatially resolved measurements. In this work, an in-situ digital image correlation (DIC) system was employed to monitor and measure full-field and localized strain accumulation across the entire joint. DIC results revealed varying local creep strain in different locations, and the creep mechanisms were analyzed based on fractographic analysis of creep-rupture specimens. Additionally, microstructural analysis of the interface diffusion zone was conducted to investigate the relationship between creep performance and diffusion characteristics. Overall, this study demonstrates the enhanced creep performance of graded composite transition joints. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |