Accession Number : ADA018059

Title :   Influence of Iron and Silicon Content on the Tensile Properties of 7X75 and ZR-Modified 7X75 Aluminum Plate.

Descriptive Note : Rept. for Jun 74-Jun 75,


Personal Author(s) : Blau,Peter J.

Report Date : OCT 1975

Pagination or Media Count : 38

Abstract : This report studied how tensile strength and ductility of 7475-type aluminum plates were affected by Fe and Si content (purity), minor Zr substitutions for Cr, and thermomechanical processing (TMP) versus T651 tempers. In all, twenty combinations of composition and temper were examined. Smooth tensile specimens with 1/4 and 1/2 inch diameters were used. As Fe and Si content decreased, elongation and reduction of area increased in all but the T651 Zr-containing alloys. Purity had little effect on ultimate tensile and yield strength. The Zr-containing alloys were generally stronger than the Cr-containing alloys and had comparable ductility. Compared to the T651 temper, TMP had lower strength and higher ductility. TMP also increased the alloy's sensitivity to the Fe and Si content. (Author)

Descriptors :   *Aluminum alloys, *Metal plates, Iron, Silicon, Zirconium, Chemical properties, Purity, Chemical composition, Tempering, Tensile strength, Ductility, Yield strength, Thermomechanics, Heat treatment, Mechanical properties

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE