| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Enhanced Mechanical Properties in TiC/B4C-CoCrFeMnNi High-Entropy Composites Fabricated by Direct Energy Deposition |
| Author(s) |
Hyoung Seop Kim, Soung Yeoul Ahn |
| On-Site Speaker (Planned) |
Hyoung Seop Kim |
| Abstract Scope |
This research investigates the microstructures of TiC/B4C-CoCrFeMnNi high-entropy composite materials (HECs) created using the direct energy deposition (DED) method in additive manufacturing, focusing on the influence of TiC and B4C nanoparticles in improving mechanical properties. The study finds that, despite having larger dislocation cell structures and finer boundaries than CoCrFeMnNi high-entropy alloys (HEAs), TiC/B4C-CoCrFeMnNi HECs demonstrate markedly increased hardness and strength, defying conventional beliefs about the relationship between strength and size. Furthermore, the study delves into the interactions between ceramic nanoparticles (TiC and B4C) with high melting points and the CoCrFeMnNi HEA matrix. The rapid scanning process during DED does not allow for complete melting of the nanoparticles, resulting in a unique distribution of elements within the cell structure. These results offer valuable insights into the selection of appropriate nanoceramic particles for the development of HECs through metal additive manufacturing. |