Part-through fracture toughness (KIe) and crack-tip opening displacement (CTOD) of welded joints of AA2014-T6 at low temperatures |
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| Affiliation: | 1. Department of Applied Mechanics, Indian Institute of Technology Delhi, New Delhi, India;2. Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India;1. Instrument and Control Engineering Research Department, Steel Research Laboratory, JFE Steel Corporation, 1-1 Minamiwatarida-cho, Kawasaki-ku, Kawsaki 210-0855, Japan;2. Steelmaking Research Department, Steel Research Laboratory, JFE Steel Corporation, 1 Kawasaki-cho, Chuo-ku, Chiba 260-0835, Japan;3. Plant Control Department, East Japan Works, JFE Steel Corporation, 1-1 Ohgishima, Kawasaki-ku, Kawasaki 210-0868, Japan;4. Steelmaking Department, East Japan Works, JFE Steel Corporation, 1-1 Ohgishima, Kawasaki-ku, Kawasaki 210-0868, Japan |
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| Abstract: | The part-through fracture toughness (KIe) and crack-tip opening displacement (CTOD, δm) of welded joints of aluminum alloy (AA) 20l4-T6, including the weld metal, the fusion zone (FZ), the heat-affected zone (HAZ), and the base material, were investigated at both liquid nitrogen temperature and liquid helium temperature with surface-crack tension (SCT) specimen and single-edge-notched bend (SENB) specimen respectively. Results indicate a conventional fusion welding process leads to formation of second-phase precipitations and inclusions, which cause significant reduction of fracture resistance at the weld metal and the FZ by fractographic analyses of fractured surface. |
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| Keywords: | AA2014-T6 Welded joint Low temperature |
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