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- W567815909 abstract "The effects of electron beam welding on the fracture behavior of a recrystallization annealed, extra-low-interstitial Ti-6Al-4V alloy have been investigated at temperatures in the ambient-to-cryogenic range. Plane strain fracture toughness (K I c ) and subcritical crack growth parameters were measured using compact specimens 10 to 25.4 mm thick. These parameters can be used to predict the safe operating lifetimes of cryogenic pressure vessels and other welded Ti-6Al-4V structures. At intermediate stress intensity factors and within the data scatter for replicate tests, the growth rates of fatigue cracks sited in the fusion and heat-affected zones of electron beam weldments were temperature insensitive and nearly equivalent to rates for the base metal. However, electron beam welding introduced a zone of low fracture toughness at the heat-affected-zone/fusion-zone boundary. The K I c value for this boundary zone at liquid nitrogen temperature (76 K) was 51 MPa/m 1 / 2 , 16 percent lower than the base metal. The base metal fracture toughness increases between 4 and 295 K, with an abrupt transition to higher K I c values occurring at temperatures between 76 and 125 K. Static load cracking, temperature effects, and specimen orientation effects on the fracture behavior of this titanium alloy are central topics of discussion." @default.
- W567815909 created "2016-06-24" @default.
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- W567815909 date "2009-03-18" @default.
- W567815909 modified "2023-09-23" @default.
- W567815909 title "Low Temperature Fracture Behavior of a Ti-6A1-4V Alloy and Its Electron Beam Welds" @default.
- W567815909 doi "https://doi.org/10.1520/stp26548s" @default.
- W567815909 hasPublicationYear "2009" @default.
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