About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Role of Local Chemical Order on Orientation Relationship Determination in High Entropy Alloys |
Author(s) |
Elaf A. Anber, Daniel Foley, Diana Farkas , Anatoly Frenkel, Mitra L Taheri |
On-Site Speaker (Planned) |
Elaf A. Anber |
Abstract Scope |
High entropy alloys (HEAs) have attracted the major interest due to their novel mechanical and structural properties. Local chemical ordering (LCO) plays an important role in determining thermal and electrical conductivity of solid solutions, diffusion, and passivity of alloys containing elements that are electrochemically active. Here, we examined the role of LCO on the OR of BCC precipitates in annealed Al0.3CoCrFeNi via using in-situ and ex-situ TEM heating techniques, where we report a new BCC-ORs due to local chemical fluctuations. These studies were coupled with Extended Electron Energy Loss Fine Structure (EXELFS) and Energy-dispersive X-ray spectroscopy (EDS). Additional insight is obtained from molecular dynamics atomistic simulations that examine the various possible orientation relationships and interface dislocations for the B2 precipitates in these Al containing HEA’S. Overall, the LCO associated with ORs offers new opportunities to tune properties, enabling a more predictive view of designing remarkable age-hardening alloys. |
Proceedings Inclusion? |
Undecided |