Plasticity improvement and radiation hardening reduction of Y doped V-4Cr-4Ti alloy

Zhang, Yifan; Li, Ranran; Diao, S.Z.; Wan, Fang; Qu, Zhan

doi:10.1016/j.jnucmat.2022.153508

Cited by 8 publications

(1 citation statement)

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“…The MAX phase is a ternary layered ceramic with carbon or nitrogen as the key elements, and based on its excellent chemical stability [12][13][14][15][16], our group introduced MAX phase, "Ti 3 SiC 2 " nanoparticles, for the dispersion strengthening of the V-4Cr-4Ti alloy by mechanical alloying. Y is also added to reduce impurity elements such as O in the matrix [17,18]. Furthermore, the addition of Y can also enhance mechanical performance and reduce irradiation hardening [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Irradiation Hardening and Microstructure Study of MAX-Phase-Dispersion-Strengthened Vanadium Alloy under Self-Ion Irradiation

Zhao,

Zheng,

Wei

et al. 2024

Metals

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V-4Cr-4Ti alloy is one of the candidate structural materials for future fusion reactors due to its desirable characteristics. In our previous research, MAX-phase-dispersion-strengthened vanadium alloy (V-4Cr-4Ti-1.5Y-0.3Ti3SiC2), prepared through mechanical alloying, showed excellent thermal stability and creep resistance and was expected to have good radiation resistance. This study investigates the effects of 2.5 MeV V2+ ion irradiation on V-4Cr-4Ti-1.5Y-0.3Ti3SiC2 and V-4Cr-4Ti alloys at 500 °C, with peak damage of 0.8, 3.5, and 6.1 dpa. Transmission electron microscopy and nanoindentation were used to examine the changes in microstructure and hardness before and after irradiation. The microscopic analysis reveals that dispersed nanoparticles maintained good stability under irradiation. Defect clusters grow with increasing irradiation doses in both materials. The nanoindentation results show that V-4Cr-4Ti-1.5Y-0.3Ti3SiC2 has higher initial hardness and lower irradiation hardening, indicating better resistance to radiation hardening than V-4Cr-4Ti. This research serves as a valuable reference for the assessment of the irradiation resistance of Ti3SiC2-dispersion-strengthened V-4Cr-4Ti alloy.

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