Defects in High Entropy Alloy HfNbTaTiZr Prepared by High Pressure Torsion |
| F. Lukáča, b, M. Dudra, J. Čížekb, P. Harcubab, T. Vlasákb, M. Janečekb, J. Kuriplachb, J. Moonc, H.S. Kimc, J. Zýkad, J. Málekd
aInstitute of Plasma Physics CAS, Za Slovankou 3, 182 00, Praha, Czech Republic bFaculty of Mathematics and Physics, Charles University, V Holesovickach 2, 180 00 Praha 8, Czech Republic cDepartment of Materials Science and Engineering, POSTECH, Pohang 790-784 dUJP PRAHA a.s., Nad Kamínkou 1345, 156 00, Prague, Czech Republic |
| Full Text PDF |
| High entropy alloy HfNbTaTiZr was successfully processed by severe plastic deformation using high pressure torsion (HPT) and ultrafine grained microstructure was achieved. The microstructure of HPT-deformed HfNbTaTiZr alloy was characterized by X-ray diffraction and compared with conventionally cast ingots. The lattice defects introduced by HPT processing were characterized by positron annihilation spectroscopy. The X-ray diffraction profiles of HTP-deformed samples were extremely broadened due to small sizes of coherently diffracting domains and a high microstrain introduced by severe plastic deformation. |
DOI:10.12693/APhysPolA.134.891 PACS numbers: 78.70.Bj, 61.72.Ff |