| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
High-Cycle & Low-Cycle Fatigue Study of Additively Manufactured Nanoprecipitation Strengthened High Entropy Alloys |
| Author(s) |
Poresh Kumar, Tu-Ngoc Lam, Mao-yaun Luo, Lia Amalia, Jing-Syuan Lai, Ke An, Yan Chen, Dunji Yu, Peter K Liaw, Po-Heng Chou, An-Chou Yeh, Soo Yeol Lee, Jayant Jain, Sudhanshu Shekhar Singh, E-Wen Huang |
| On-Site Speaker (Planned) |
Poresh Kumar |
| Abstract Scope |
Complex-shaping with noted additional strengthening through additive-manufacturing route has been an attractive trend to reach a potential benchmark for structural components. Meanwhile, high-entropy material design is a hot topic to develop advanced materials. A significant contribution in strengthening through additive-microfeatures and precipitations after ageing has been noted under monotonic-loading in dual-precipitate containing Al0.2Co1.5CrFeNi1.5Ti0.3 high entropy alloy system. In this study we have investigated the fatigue-behavior of above-mentioned alloys from low cycle to high cycle. Specifically, for low-cycle fatigue the detailed microstructural variations and role of precipitates has been explored through in-situ neutron diffraction experiment combined with transmission electron-microscopy. The results revealed the effective strengthening by smaller precipitates without causing risk of crack-initiation and crack-hinderance by bigger precipitates. Line profile analysis of diffraction-patterns shows dislocation generation and dislocation activity guided the fatigue-deformation, which reflected the shifting of dislocation arrangement and dislocation character during the initial cycles. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Other |