| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Laser Powder Bed Fusion of Crack-free High Gamma Prime Rene 77 Superalloy: Processing, Heat Treatment, Mechanical Properties and Applications |
| Author(s) |
Marcus C. Lam |
| On-Site Speaker (Planned) |
Marcus C. Lam |
| Abstract Scope |
Laser powder bed fusion (LPBF) can be difficult for high gamma prime nickel-based superalloys critically needed for high-temperature, high-strength application. In this presentation, we are reporting successful fabrication of a modified Rene77 superalloy (Al + Ti > 6 wt.%) by LPBF in crack-free state. In addition, a novel post heat treatment method resulted in tensile and creep performance surpassing the commonly used IN718 and even the conventional Rene 77 at up to 650⁰C. The massive grain growth rarely seen in LPBF superalloys that enabled by the heat treatment will also be discussed in detail. The fracture surfaces at different temperature and loading conditions will also be presented to understand the deformation mechanism. The LPBF process and post treatments were also performed on actual gas turbine components, validating the techniques developed for actual industrial applications. |