|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Development of a Process Optimization Framework for Fabricating Fully Dense NiCoCr Medium Entropy Alloy using Laser Directed Energy Deposition
||Thaer Syam, Bilal Mansoor, Ibrahim Karaman
|On-Site Speaker (Planned)
Multi-principal alloys, such as medium entropy alloys (MEAs) show promise due to their superior mechanical properties such as high strength-to-weight ratios. Here, we report our initial results on laser-based Direct Energy Deposition (DED) of pre-alloyed NiCoCr - focusing on the challenges associated with achieving dense NiCoCr parts using this process. As a first step, basic single-track experiments were employed to chart the range of parameters including scanning speed, power and RPM, and a blend of geometric factors for hatch spacing and layer height was suggested to identify parameter combinations that accomplish desired build heights while minimizing the formation of porous regions. 19 parameter combinations were identified and prisms of 8mm by 8mm with variable target heights were printed for further analysis. Initial, printability maps were constructed based on the main process parameters, and criteria for hatch spacing, layer height and dilution limits as an output of the melt pool characteristics.
||Planned: Metallurgical and Materials Transactions