| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing Modeling and Simulation: AM Materials, Processes, and Mechanics
|
| Presentation Title |
Mechanical and Surface Properties of Inconel 718 Alloy Fabricated by Additive Manufacturing |
| Author(s) |
Junseong Kim, Dowon Song, Yun kon Joo, Guanlin Lyu, SeungCheol Yang, Jing Zhang, Yeon-Gil |
| On-Site Speaker (Planned) |
Junseong Kim |
| Abstract Scope |
In this study, the applicability of the superalloy fabricated by additive manufacturing was investigated in comparison to the conventionally forged superalloy. The microstructure and mechanical properties of the 3D printed Inconel 718 alloy before and after hot isostatic pressing were characterized and compared to the conventionally forged alloy. The as-printed alloy showed lower hardness and elastic modulus than the HIP-treated and forged alloy due to its large amounts of defects, showing many pores at the melt pool boundary on the fractured surface after tensile test. The HIP-treated alloy showed denser microstructure, implying lower fracture toughness. The yield strength was increased after HIP, while the tensile strength showed increase. However, the elongation was evidently deteriorated after HIP. The plastic deformation of the HIP-treated alloy after yielding was low, resulting in a rapid fracture. Also, the surface properties for the superalloy prepared by 3D printing were improved by applying the diffusion coating. |