Open AccessPhysical Testing and Surface Morphology Studies of Stainless Steel Irradiated with Xe Ions
Author(s) -
Chaoliang Xu,
Xiangbing Liu,
Yuanfei Li,
Wenqing Jia,
Wangjie Qian,
Qiwei Quan,
Jian Yin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2083/2/022036
Subject(s) - irradiation , dislocation , materials science , vacancy defect , transmission electron microscopy , positron annihilation spectroscopy , ion , swelling , microstructure , number density , austenitic stainless steel , analytical chemistry (journal) , positron , crystallography , composite material , positron annihilation , electron , nanotechnology , chemistry , nuclear physics , thermodynamics , physics , corrosion , organic chemistry , chromatography
6 MeV Xe ions were used to irradiate austenitic stainless steel at room temperature. Three displacement damage levels of 2,7 and 15 dpa were selected. Microstructure and surface morphology were characterized by transmission electron microscopy (TEM), positron annihilation lifetime spectroscopy (PLS) and atomic force microscope (AFM). PLS indicated that vacancy defects were introduced by ions irradiation. Vacancy clusters containing Xe will reduce the positron annihilation lifetime. High density of dislocation loops were observed by TEM. The dislocation loops size and density saturates after 7 dpa and the nature of dislocation loops can be deduced by its distribution. A surface step was detected by AFM measurements between irradiated region (uncovered) and unirradiated region (covered with nickel mesh). This indicate that the irradiation swelling phenomenon occur and swelling is closely related to irradiation damage. According to the step height, the volume swelling is about 1.7% and 4.2% after irradiated to 7 and 15 dpa.