Multi-Material Laser-Based Powder Bed Fusion Of Steels And Ni-based Superalloy

作者：Xiaoshuang Li, Nicolas Gianfolcaro, Zhang Chaoqun, Shadab Malik · 年份：2023 · DOI：10.59499/ep235741167 · 研究领域：Additive Manufacturing Materials and Processes、High Entropy Alloys Studies、Additive Manufacturing and 3D Printing Technologies

The emerging multi-material additive manufacturing technology enables the production of components with region specific properties via a single-step manufacturing process. One of various advantages is to combine high performance and high-cost materials with low performance and low-cost materials. In the present study, the selected Inconel 625 superalloy and common 316L steel were additively manufactured by laser-based powder bed fusion. Regardless of the presence of material boundary, a continuous scanning strategy was used to optimize processing parameters for both materials with the assistance of artificial intelligence. It turned out that it is feasible to make fully dense parts with a single set of parameters. Intensive material mixing at the interface shown in the SEM results indicates sound metallurgical bonding. In addition to great manufacturability, the manufacturing speed was greatly improved up to two times by employing large hatch spacing coupled with proper laser powder, scanning speed and layer thickness.