Current industrial design practices place emphasis on properties in order to ensure that a product provides structural integrity. Mechanical properties are largely influenced by the direction of testing with respect to the wrought microstructure. In aluminum alloys the properties sensitive to direction are strength, ductility, and fracture toughness. In this study, the Double Ligament Tensile (DLT) test was used to evaluate the tensile properties and anisotropy of premium quality cast hypoeutectic and hypereutectic aluminum-silicon alloys of cylindrical cross section, and age-hardened commercial wrought aluminum-magnesium-silicon and aluminum-zinc-magnesium plates of limited section thickness. Comparisons reveal that the DLT test results accord well with standard conventional test data. The difference in tensile properties observed with direction of testing is attributed to the well-developed mechanical fibering that exists in the wrought alloys examined. The transverse brittleness observed in these alloys is due to the presence of particle stringers, grain boundary precipitates, and unhealed porosity.
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