| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-114: Investigation of the Effect of Beam Scan Strategies on the Microstructure of EBM Additively Manufactured Inconel 738 Builds |
| Author(s) |
Chris Blackwell, Meiyue Shao, Sriram Vijayan, Sabina Kumar, Sudarsanam S Babu, Joerg R Jinschek |
| On-Site Speaker (Planned) |
Chris Blackwell |
| Abstract Scope |
Additive manufacturing (AM) offers fast, customizable, near-net production of metallic parts, especially when sophisticated part geometries are required. However, the microstructures of these AM parts often vary from those produced by traditional manufacturing. During the AM build process, materials experience complex, cyclic thermal gradients that lead to microstructural inhomogeneities. More empirical data is needed for different alloy/AM method combinations. Here we characterize effects of electron-beam melting powder-bed fusion (EBM-PBF) on Inconel 738 (IN738) microstructures. In Inconels, previous studies have shown that precipitate locations and morphologies are dependent on cooling rates, while similar studies looking at titanium alloys have shown that matrix phase grain sizes and morphologies vary with electron beam scanning parameters. Three different IN738 samples, built under different electron beam scanning strategies, are analyzed using SEM. Precipitate phase densities, compositions, and morphologies; gamma grain sizes and orientations; as well as microhardness are quantified with statistical significance. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |