Xe Ion Irradiation-Induced Microstructural Evolution and Hardening Effect of Nickel-Base Superalloy | Zendy

Yu Hou | Zendy; De-hui Li | Zendy; Yanling Lü | Zendy; Hefei Huang | Zendy; W. Z. Yang | Zendy; Ren-Duo Liu | Zendy

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Xe Ion Irradiation-Induced Microstructural Evolution and Hardening Effect of Nickel-Base Superalloy

Author(s) -

Yu Hou,

De-hui Li,

Yanling Lü,

Hefei Huang,

W. Z. Yang,

Ren-Duo Liu

Publication year - 2021

Publication title -

science and technology of nuclear installations

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.417

H-Index - 24

eISSN - 1687-6083

pISSN - 1687-6075

DOI - 10.1155/2021/5535478

Subject(s) - materials science , irradiation , nanoindentation , hardening (computing) , fluence , superalloy , transmission electron microscopy , ion , nanoindenter , metallurgy , microstructure , dislocation , composite material , nanotechnology , chemistry , physics , organic chemistry , layer (electronics) , nuclear physics

The nickel-base superalloy Hastelloy N was irradiated using 1 MeV Xe20+ and 7 MeV Xe26+ ions with displacement damage ranging from 0.5 dPa to 10 dPa at room temperature (RT). The irradiated Ni-based superalloy was characterized with transmission electron microscopy (TEM), XRD, and nanoindenter to determine the changes in microstructural evolution and nanoindentation hardness. The TEM results showed that ion irradiation induced a large number of defects such as black spots and corrugated structures and the second phase was rapidly amorphized after being irradiated to a fluence of 0.5 dPa. The XRD results showed that the Hastelloy N alloy sample did not undergo lattice distortion after ion irradiation. An obvious irradiation hardening phenomenon was observed in this study, and the hardness increased with Xe ion fluence. The pinning effect in which the defects can become obstacles to the free movement of dislocation may be responsible for the irradiation-induced hardening.

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