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- W2425458765 abstract "This study is focused towards the development of the technique for investigating the fracture behaviour of 100 µm thick rolled tungsten foils, with a purity of 99.97%. Electron backscatter diffraction (EBSD) scans reveal that the grains are elongated along the rolling direction of the foil, which has a very strong {100}< 011 > texture. The test specimens were fabricated by electrical discharge machining (EDM) and cracks were initiated by consecutively using a diamond wire saw, a razor blade and a focused ion beam (FIB) workstation. Fracture experiments were performed at temperatures from −196 °C to 800 °C. The investigation of fracture appearance shows an improved behavior and significantly higher values of conditional fracture toughness Kq compared to bulk W-materials, which can be related to a higher degree of deformation during the production process. A high toughness at room temperature (RT) and 200 °C, slowly decreases when approaching the highest testing temperature of 800 °C. The most significant result reveals that the ductile to brittle transition temperature (DBTT) is around RT, which is an extraordinary result for any tungsten material. The fracture surfaces, investigated with a scanning electron microscope (SEM), show a transition from cleavage fracture at liquid nitrogen temperature, through pronounced delamination within the foil plane at ambient temperatures to ductile fracture at the highest testing temperatures." @default.
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- W2425458765 date "2016-12-01" @default.
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- W2425458765 title "Improved fracture behavior and microstructural characterization of thin tungsten foils" @default.
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- W2425458765 doi "https://doi.org/10.1016/j.nme.2016.06.003" @default.
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