Mechanical properties of explosively welded AA2519-AA1050-Ti6Al4V layered material at ambient and cryogenic conditions

Publication date: 5 November 2017
Source:Materials & Design, Volume 133
Author(s): Dariusz Boroński, Maciej Kotyk, Paweł Maćkowiak, Lucjan Śnieżek
This study presents the results of the mechanical properties of explosively welded AA2519-AA1050-Ti6Al4V layered material tested at ambient temperature and in cryogenic conditions. The possibility of modeling its mechanical properties based on the base material properties was additionally verified. Fractures of base materials and layered material specimens were also analyzed in order to determine the failure mechanisms in both temperature conditions. The results confirmed that the strength of aluminum alloys and titanium alloys improved with a decrease in temperature. The same effect was achieved for the layered material.It has been proved in this study that it is possible to model the layered material yield stress and ultimate tensile strength based on the analysis of its base material properties with some percent error. A much more problematic issue is to predict the elastic properties of the layered material described, e.g., by tensile elasticity modulus. The stiffness of the layered material depends on the load level and varies after aluminum alloy plastification. An influence of the mutual interaction of the explosively welded layers on Poisson's ratio was also observed.

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