Influence of iron and silicon content on the tensile properties of 7x75 and Zr-modified 7x75 aluminum plate. Report for Jun 1974--Jun 1975

Technical Report · Wed Oct 01 04:00:00 EDT 1975

OSTI ID:7334615

Blau, P J

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.

• Research Organization: Air Force Materials Lab., Wright-Patterson AFB, Ohio (USA)
• OSTI ID: 7334615
• Report Number(s): AD-A-018059; AFML-TR-75-140
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
HEAT TREATMENTS
IRON ADDITIONS
IRON ALLOYS
MECHANICAL PROPERTIES
PLATES
SILICON ADDITIONS
SILICON ALLOYS
TENSILE PROPERTIES
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS