|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||P24: Radiation-induced Damage of CrMnFeNi-based High-entropy Alloys
||Zhouran Zhang, Patrick S Grant, David E J Armstrong
|On-Site Speaker (Planned)
CrMnFeCoNi HEA has been extensively investigated and exhibits many promising properties. Early experiments of CrMnFeCoNi and Cr0.66MnFeNi HEA under ion implantation indicated their potentials as structural materials in nuclear applications. CrMnFeCoNi, Cr0.66MnFeNi and yttrium-doped CrMnFeCoNi HEA were irradiated with 2 MeV V and Ni ions at temperature of 500oC and at 0.4 and 2.7 displacements per atom (dpa). Using advanced characterisation techniques, radiation-induced damage was investigated. All alloys show significant depletion of Mn, minor depletion of Cr, significant enrichment of Ni and slight enrichment of Fe along grain boundaries at 2.7 dpa. The segregation of y-doped CrMnFeCoNi is less pronounced. Both V and Ni ions were used in order to investigate the effect of particle type on radiation damage. Nano indentation tests showed that the irradiated specimens showed no obvious hardening at 0.4 dpa but an increase of ~10% and ~15% at 2.7 dpa in y-free and y-doped CrMnFeCoNi HEA.