Effects of irradiation temperature on Ne ion irradiated binary nickel-based alloys

ABSTRACT

The evolution processes of the defects in Ni, Ni-Cr and Ni-Mo alloys under 400 keV Ne ion irradiation at different temperatures were investigated. At room temperature, the defect sizes are between 2 and 4 nm and defect densities are in the range of 1.24 × 10¹⁵–1.39 × 10¹⁵ m⁻². With increasing irradiation temperature, the defect sizes become larger, and the defect densities decrease. Moreover, under irradiation at high temperature, Ni-Mo and Ni-Cr alloys show the higher defect densities and smaller defect sizes than Ni. These are ascribed to the pinning effects of solid solution elements on the ion irradiation-induced defects in the nickel-based alloys.

KEYWORDS:

• Nickel-based alloy
• defect evolution
• transmission electron microscopy

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11675246). Ne ion implantation was performed at the Center for Integrated Nanotechnologies (CINT), an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the US Department of Energy’s NNSA, under contract 89233218CNA000001.