|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||The Paracrystalline Nature of Lattice Distortion in High Entropy Alloys
||Jian Min Zuo, Yu-Tsun Shao, Haw-Wen Hsiao, Renliang Yuan, Qun Yang
|On-Site Speaker (Planned)
||Jian Min Zuo
Severe lattice distortion is suggested for high entropy alloys (HEAs), however, evidence for such effect so far is lacking, and the nature of distortion is yet to be understood. Here, we reveal the distortion in selected fcc and bcc HEAs by direct electron imaging and electron nanodiffraction. Information about crystal symmetry, lattice strain and atomic distortion are data-mined and mapped from many diffraction patterns and atomic resolution images. Application to the HEAs reveals nm-sized mosaic blocks of paracrystals and fractal strain field across nanoscopic to mesoscopic scales. As lattice distortion impedes dislocation motion and contributes to strengthening, results here thus provide critical insights about the complex nature of distortion in HEAs.