| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Utilizing a Hot-Isostatic Pressing Controlling Pore Defect in Direct Energy Deposited CoCrNi Medium-Entropy Alloy and Its Mechanical Stability at Liquid Helium Temperature |
| Author(s) |
Sang-Hun Shim, Seong-June Youn, Ka Ram Lim, Young-Kyun Kim, Young-Sang Na |
| On-Site Speaker (Planned) |
Sang-Hun Shim |
| Abstract Scope |
At a surprisingly fast pace, applying additive manufacturing (AM) methods in metals or alloys has gained intensive interest owing to many advantages that enable the design of complex structural components with high performance. However, the AM products result in the formation of manufacturing defects, which causes mechanical degradation in extreme environments. Here, we systematically investigated the effect of hot-isostatic pressing (HIP) treatment on microstructure and mechanical stabilities of additively manufactured CoCrNi medium-entropy alloys fabricated by direct energy deposition (DED) at ambient and cryogenic temperatures (e.g., 298 K, 77 K, and 4.2 K). HIP treatment enables the facilitation of microstructure homogeneity and structural densification. Poorly limited ultimate tensile strength (UTS) and total elongation (T.E) were found in DED-processed CoCrNi, whereas the HIP-treated CoCrNi exhibited excellent UTS×T.E synergies. Our findings provide great insights into the structural/mechanical stabilities of effect on HIP treatment in DED-processed CoCrNi at near absolute zero temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Environmental Effects |