| About this Abstract |
| Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
| Symposium
|
HEA 2023
|
| Presentation Title |
Controlling the Sources of Interstitial Constituents in Refractory Complex Concentrated Alloys |
| Author(s) |
Calvin H. Belcher, Sakshi Bajpai, Vivek Verma, Benjamin MacDonald, Diran Apelian, Enrique Lavernia |
| On-Site Speaker (Planned) |
Diran Apelian |
| Abstract Scope |
Recent findings reveal that interstitial constituents, especially oxygen and nitrogen, inadvertently introduced in refractory complex concentrated alloys (RCCAs) significantly contribute to, and convolute observations of, ductility and strength of the alloys at room temperature. Plasma arc melting (PAM) has facilitated the quest for RCCAs showcasing remarkable blends of strength and ductility. In this work, we studied the composition and chemistry of residual gases in the PAM chamber environment during arc melting using a mass spectrometer to better quantify methodologies utilized to control sources of oxygen and nitrogen, in arc melted RCCAs. Moreover, thermodynamic mechanisms of the absorption of interstitial constituents was investigated by arc melting MoNbTaW and NbTiZr RCCAs. With respect to interstitial constituents, the RCCAs were characterized using electron microscopy and atom probe tomography. Correlations between the microhardness and microstructures of the RCCAs aided elucidation of the influence of the interstitial constituents on the mechanical properties of the RCCAs. |
| Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |