Accession Number : AD0859716

Title :   The Effect of Strain Rate and Microstructure on Strength and Ductility of 7075 Aluminum Alloy at 775F and 900F.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Peterson, Ronald W.

Report Date : JUN 1969

Pagination or Media Count : 53

Abstract : The strength and ductility of 7075 aluminum alloy under hot-working conditions were explored by testing tensile specimens at 775F and 900F. The strain rates used were 0.4, 0.8, 1.6, and 4.0 in./in./sec. A small range in grain sizes was obtained by heating swaged samples at 900F for up to 144 hr, so larger grains were grown by straining specimens 6%, then heating them at 930F. The results showed increasing strength and decreasing ductility as the strain rate was increased, and decreasing strength with increasing temperature. Strain-rate sensitivity with temperature was experienced. No significant change in strength with grain size was found. (Author)

Descriptors :   (*ALUMINUM ALLOYS, HOT WORKING), TENSILE PROPERTIES, DUCTILITY, STRAIN(MECHANICS), MICROSTRUCTURE, GRAIN SIZE, THESES.

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE