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Abstract
Ingots in AI-4·5Cu-1·5Mg alloy containing varying types and vol.-% of nonmetallic inclusions were produced by semicontinuous casting techniques. Tensile properties in the longitudinal, long-transverse, and short-transverse directions obtained on rolled products have been shown to decrease with increasing inclusion content in the alloy, the short-transverse test showing the greatest decrease. Changes in properties were related to the percentage area of inclusion in the fracture of the restpiece and the results showed that the effects of inclusions on properties are dependent on the total content, size, type, and distribution of inclusions as well as on the structural condition of the alloy. A strip testpiece chill casting was found to give tensile results that reflect the inclusion content of the alloy in a manner similar to those of wrought testpieces.