Dynamic fatigue behavior of lithium hydride at elevated temperatures

Zhang, Wangzi; Peng, Lei; Xie, Yao; Zhou, Dexiang; Shi, Yifan; Wan, Yuanxi

doi:10.1016/j.ceramint.2021.12.299

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…All surfaces of the tensile and 3PB specimens were finely sanded prior to tests to remove the possible layer of lithium hydroxide. The strains of the tensile specimens and the deflections of the 3PB specimens were obtained via the 3D-DIC method [16,17]. Figure 2a shows the experimental setup of the 3D-DIC system, consisting of two LED lights and two cameras.…”

Section: Methodsmentioning

confidence: 99%

“…After vacuuming, all specimens were heated to the target temperature and kept for 30 min at the beginning of each test. Since LiH might be susceptible to slow crack growth and creep at elevated temperatures in long time tests [11,16], the tensile strength of LiH could be influenced in very long test times up to 4500 s from RT to 600 • C with a loading rate of 0.2 mm/min [1,2]. Low loading rates would consume more test time.…”

Section: Methodsmentioning

confidence: 99%

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Temperature Effect on Short—Term Strength of Lithium Hydride with Tensile and Three—Point Bend Specimens

et al. 2022

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Strength is one important mechanical property of lithium hydride (LiH) for application as a neutron moderator and absorbent at elevated temperatures. Using the digital image correlation (DIC) method for deformation measurement, the short—term strength of LiH was investigated with both tensile and three—point bend (3PB) specimens in the range of room temperature (RT) to 600 °C. The results show that the temperature dependence of the strength from tensile and 3PB tests shows similarity. As the temperature increases, the strength changes slightly, then rises to the maximum and finally decreases due to the softening effect. The fracture surfaces of specimens show the main characteristics of trans—granular fracture at different temperatures, except for 600 °C. With increasing temperature, the fracture surfaces become rough and numerous tortuous micro—cracks are found. Especially for 3PB specimens, there are dimple—like structures with distorted grains and obvious intergranular cleavage fracture.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%