| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Temperature Creep Properties of Advanced Structural Materials
|
| Presentation Title |
Mechanisms of Creep in Additively Manufactured NiCoCr and ODS-NiCoCr Multi-principal Element Alloys |
| Author(s) |
Gianmarco Sahragard-Monfared, Mingwei Zhang, Timothy Smith, Easo George, Jeffery Gibeling |
| On-Site Speaker (Planned) |
Gianmarco Sahragard-Monfared |
| Abstract Scope |
Multi-principal element alloys (MPEA) have been proven to exhibit excellent room temperature and cryogenic strength and ductility. However, MPEAs with an FCC crystal processed by arc melting generally exhibit low strengths at elevated temperatures. Alternative manufacturing processes provide an opportunity to introduce dispersoids into the matrix to improve high temperature properties. In this study the influence of oxide dispersion strengthening (ODS) on the steady state and constant structure creep behavior of an MPEA produced by additive manufacturing (AM) is investigated. Constant stress and stress reduction creep tests were performed on AM-NiCoCr and an oxide dispersion strengthened variant containing one weight percent yttria (ODS-NiCoCr). The stress reduction tests enable the kinetics of deformation to be studied at constant structure, resulting in activation areas that reveal the rate controlling mechanisms of these MPEAs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, High-Temperature Materials |