Accession Number : ADA189870

Title :   The Age Hardening Response of Thermomechanically Processed Al-Mg-Li Alloys.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Ferris, William F

PDF Url : ADA189870

Report Date : Dec 1987

Pagination or Media Count : 85

Abstract : Four Al-Mg-Li alloys of composition (weight percent) in the ranges 6-8% Mg, 0.5-2% Li, and 0.15-0.25% Zr were hot forged and warm rolled (thermo-mechanically processed) to achieve a microstructure suitable for superplasticity. They were then subjected to age-hardening studies at temperatures indicated by concurrent differential scanning calorimetry research. Optical and transmission electron microscopy techniques were used to relate microstructure to mechanical properties. Only the 6%Mg-2%Li alloy showed significant age hardening response, however, concurrent research demonstrated excellent superplastic response in the 6%Mg-1%Li and 8%Mg-1%Li alloys. Keywords: Thermomechanically, Processed, Superplasticity, Age Hardening Studies, Aluminum alloys, Magnesium alloys, Lithium alloys.

Descriptors :   *AGE HARDENING, *ALUMINUM ALLOYS, LITHIUM ALLOYS, MAGNESIUM ALLOYS, MECHANICAL PROPERTIES, MICROSTRUCTURE, PLASTIC PROPERTIES, RESPONSE, TEMPERATURE, MICROSCOPY, ZIRCONIUM, MODULUS OF ELASTICITY, DENSITY, TENSILE STRENGTH, THERMOMECHANICS, THESES

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE