| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Undergraduate Student Poster Contest
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| Presentation Title |
SPU-8: Tailoring Microstructure and Twin-Induced Work Hardening of a Laser Powder Bed Fusion Manufactured Haynes 188 Alloy
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| Author(s) |
Yang Liu, Chi Zhang, Jiaqi Lu, Aijun Huang, Fei Chen |
| On-Site Speaker (Planned) |
Yang Liu |
| Abstract Scope |
This study investigates a Co-based Haynes 188 superalloy prepared via Laser Powder Bed Fusion. The as-built specimen exhibits arrayed stacking faults, Lomer–Cottrell locks, dislocations, and M6C/M23C6 eutectic carbides. After heat treatment, grain size increases, dislocation density reduces, and eutectic carbides dissolve, lowering yield strength to 488 MPa. However, annealing twins enhance twin-twin interaction networks, resulting in an improved ultimate tensile strength of 1002 MPa and elongation of 68.1%. This work provides an effective method to improve the mechanical properties of Co-based superalloys by additive manufacturing, which is essential for the development of high-performance superalloys and their manufacturing methods. |