About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
Presentation Title |
D-12: Enhancing the Mechanical Properties of C-doped NiCoCr Medium-entropy Alloy by Utilizing Features of Laser-powder Bed Fusion Process |
Author(s) |
So-Yeon Park, Ji-Eun Ahn, Young-Kyun Kim, Kee-Ahn Lee |
On-Site Speaker (Planned) |
So-Yeon Park |
Abstract Scope |
NiCoCr medium-entropy alloy (MEA) exhibits excellent extreme environmental resistances and has recently been in the spotlight of many researchers. However, because of low strength, complex process procedures such as superplastic process are applied to improve mechanical properties. Recently, it is reported that the laser-powder bed fusion (L-PBF) technology, one of the representative additive manufacturing (AM), affect the unique microstructure formation. In this study, 0.25~0.75 at% of carbon was added to enhance NiCoCr MEA. It aimed to implement sub-cells constructed by dislocation network and in-situ nano-precipitates through L-PBF. In addition, mechanical properties were controlled through heat treatment. As a result, HT caused the stabilization of the matrix and increased particle fractions (about 2 times) and the tensile strength at room temperature rises from 978.2 MPa (0.25C) to 1156.9 MPa (0.75C HT). The method for the alloy development using the AM was also discussed based on the deformation behavior of L-PBF MEA. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Entropy Alloys, |