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- W4385304872 abstract "The fatigue performance of bolts directly determines the safety of aircraft. Here, we report a novel electromagnetic shocking (EMS) strategy to achieve the improvement of fatigue life in metastable β titanium alloy bolts. The width of α-grain boundary was obviously decreased, accompanied by the reduction of dislocation density inside the β-phase grain after EMS, which is also verified by the molecular dynamics simulation. Remarkably, the rated fatigue life increases from 42.6k to 50.1k and the electrical resistivity decreases from 2.95 to 2.51 μΩ•m after EMS. The refined α-grain boundary enables cyclic loading stress transfer and weakens the obstruction of dislocation motion, which makes it difficult for crack to extend through intracrystalline and thus slows down the expansion of fatigue cracks. The work suggests the “targeting” effect of electromagnetic energy on grain boundary and dislocation with higher resistance, which provides a new way for improving the fatigue performance of engineering parts fabricated by metastable β titanium alloy." @default.
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- W4385304872 date "2023-12-01" @default.
- W4385304872 modified "2023-10-12" @default.
- W4385304872 title "Electromagnetic shocking induced fatigue improvement via tailoring the α-grain boundary in metastable β titanium alloy bolts" @default.
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- W4385304872 doi "https://doi.org/10.1016/j.jallcom.2023.171536" @default.
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