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- W2183422056 abstract "Hydride-induced embrittlement is one type of material deterioration caused by hydrogen in metals such as zirconium, titanium, magnesium, niobium and vanadium. According to in-situ electron microscopy studies, embrittlement may occur by the precipitation of brittle hydrides at stress concentration locations. The fracture of the hydrides could lead to delayed hydride cracking, which is a sub-critical crack growth mechanism operating by the repetition of hydride precipitation and fracture near the crack tip. In the present work, steady-state sub-critical crack growth in α-titanium is investigated. It is confirmed that hydride precipitation has a strong effect on the hydrostatic stress level ahead of the propagating crack and leads to significant deviations from the well-known near-tip stress distributions in elastic-plastic materials. The threshold stress intensity factor for sustained load cracking is predicted by considering the distribution of the hoop stress on the crack plane. The extent of the hydride-rich zone near the crack tip is also calculated and used for the estimation of the velocity of the crack within stage-II regime. Thus a simplified diagram of crack velocity vs. applied stress intensity factor is constructed." @default.
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- W2183422056 date "2004-01-01" @default.
- W2183422056 modified "2023-09-24" @default.
- W2183422056 title "NUMERICAL INVESTIGATION OF SUB-CRITICAL CRACK GROWTH IN α-TITANIUM DUE TO HYDRIDE FORMATION AND FRACTURE" @default.
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