| 2005 №11 (01) | 2005 №11 (03) |
The Paton Welding Journal, 2005, #11, 6-10 pages
Features of crack initiation, propagation under the conditions of off-center tension of 1441 AlДLi alloy welded joints
T.M. Labur, A.Ya. Ishchenko, T.G. Taranova, V.A. Kostin, G.M. Grigorenko
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Peculiarities of initiation and propagation of cracks at fracture of metal in HAZ of welded joints on aluminium-lithium alloy 1441, depending upon the thermophysical conditions of welding and volume content of precipitating phases, have been studied. It is shown that formation of fracture centres is related to increase in the volume content of coarse phases present in the metal structure. It has been established that the rate of metal cooling in fusion welding affects the value of the energy of crack initiation in the alloy
Keywords: fusion welding, aluminum-lithium alloy, themophysical conditions, heat-affected zone, simulation sample, fracture mechanics, off-center tension, fractorgraphy
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