TY - JOUR
T1 - Radiation resistivity of Ti-5331 alloy with different microstructures
AU - Wu, Zhen
AU - Shi, Yunmei
AU - An, Xudong
AU - Wang, Qianqian
AU - Zhu, Te
AU - Yang, Qigui
AU - Lu, Eryang
AU - Mizohata, Kenichiro
AU - Wan, Mingpan
AU - Zhang, Peng
AU - Wang, Baoyi
AU - Cao, Xingzhong
PY - 2024/11
Y1 - 2024/11
N2 - Titanium alloys have promising potential for applications in marine nuclear power systems owing to their exceptional mechanical and corrosion properties. Nevertheless, their radiation resistivity is a determining factor for their extensive use as structural materials in nuclear energy systems. In this study, the radiation resistivity of Ti–5Al–3V–3Zr–Cr (Ti-5331) alloys with three different microstructures was examined using a combination of characterization techniques including positron annihilation Doppler broadening spectroscopy (DBS), Elastic Recoil Detection Analysis (ERDA), Transmission Electron Microscope (TEM), Small-Angle X-ray scattering (SAXS) and nanoindentation. The results reveal that the equiaxed structure, bimodal structure, and Widmanstatten structure of Ti-5331 alloy obtained through different annealing processes exhibit differences in the number of interfaces and the content of the β phase. The α/β interfaces can significantly enhance the radiation resistance of titanium alloys by inhibiting the diffusion of helium atoms after helium ion irradiation. Notably, the alloy with a bimodal structure exhibited the best overall radiation resistivity, showing small defect size, low hardening effect, and low swelling rate of 0.003%. Moreover, the size of helium bubbles of the bimodal structure is half of that in the equiaxed structure and Widmanstatten structure. Thus, the bimodal structure of the Ti-5331 alloy possesses superior radiation resistivity.
AB - Titanium alloys have promising potential for applications in marine nuclear power systems owing to their exceptional mechanical and corrosion properties. Nevertheless, their radiation resistivity is a determining factor for their extensive use as structural materials in nuclear energy systems. In this study, the radiation resistivity of Ti–5Al–3V–3Zr–Cr (Ti-5331) alloys with three different microstructures was examined using a combination of characterization techniques including positron annihilation Doppler broadening spectroscopy (DBS), Elastic Recoil Detection Analysis (ERDA), Transmission Electron Microscope (TEM), Small-Angle X-ray scattering (SAXS) and nanoindentation. The results reveal that the equiaxed structure, bimodal structure, and Widmanstatten structure of Ti-5331 alloy obtained through different annealing processes exhibit differences in the number of interfaces and the content of the β phase. The α/β interfaces can significantly enhance the radiation resistance of titanium alloys by inhibiting the diffusion of helium atoms after helium ion irradiation. Notably, the alloy with a bimodal structure exhibited the best overall radiation resistivity, showing small defect size, low hardening effect, and low swelling rate of 0.003%. Moreover, the size of helium bubbles of the bimodal structure is half of that in the equiaxed structure and Widmanstatten structure. Thus, the bimodal structure of the Ti-5331 alloy possesses superior radiation resistivity.
KW - Defect
KW - Irradiation resistivity
KW - Microstructure
KW - Ti-5331 alloy
KW - 114 Physical sciences
U2 - 10.1016/j.jmrt.2024.11.078
DO - 10.1016/j.jmrt.2024.11.078
M3 - Article
AN - SCOPUS:85209393783
SN - 2238-7854
VL - 33
SP - 7777
EP - 7787
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -