| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Large-Scale Metal Additive Manufacturing
|
| Presentation Title |
Wire + Arc Additive Manufacturing (WAAM) of Al0.1CoCrFeNi High-Entropy Alloy (HEA) |
| Author(s) |
Rumman Ul Ahsan, Xuesong Fan, Jonathan D. Poplawsky, Peter K. Liaw, Duck Bong Kim |
| On-Site Speaker (Planned) |
Rumman Ul Ahsan |
| Abstract Scope |
The high-entropy alloys consist of four or more principal elements in equiatomic or near-equiatomic concentration and exhibit a unique combination of remarkable mechanical properties. Considering cost- and material-efficiency, as well as geometric flexibility, additive manufacturing (AM) technologies, can be a suitable pathway to fabricating HEAs. Through a two-stage experimentation approach involving process visualization and monitoring, the near-optimal deposition parameters for wire + arc additive manufacturing of Al0.1CoCrFeNi HEA is identified in this work. Due to the directional nature of solidification large-columnar grains are observed in the WAAM deposit. Despite being tested in the direction of grain-growth, WAAM Al0.1CoCrFeNi HEA exhibit higher yield strength compared to cast substrate (150MPa vs. 250 MPa). Based on the electron backscattered diffraction (EBSD) results, the superior yield performance of the deposit is attributed to the orientation of slip planes coupled with misorientation and sub-grain formation-induced strengthening. |