Accession Number : ADA192333

Title :   Thermomechanical Processing of Al Alloy 2090 for Grain Refinement and Superplasticity.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Spiropoulos, Procopios T

PDF Url : ADA192333

Report Date : Dec 1987

Pagination or Media Count : 86

Abstract : An aluminum copper lithium zirconium alloy, recently registered as 2090, with 7 percent lower density and 10 percent higher elastic modulus, has been introduced as a replacement for the 7075-T6 alloy. The purpose of this research is to investigate the applicability of thermomechanical processing methods developed at NPS for materials including Al-Mg and Al-Mg-Li alloys, to the 2090 alloy. The material is hot worked, cold worked, aged and warm rolled to a total true strain of about 2.4. Tensile tests were conducted at different temperatures and strain rates allowing a determination of the effect of the processing on microstructural evolution and the superplastic behavior of this material.

Descriptors :   *ALUMINUM ALLOYS, *GRAIN STRUCTURES(METALLURGY), *LITHIUM ALLOYS, *MAGNESIUM ALLOYS, *PLASTIC PROPERTIES, *REFINING, EVOLUTION(GENERAL), LOW DENSITY, METHODOLOGY, MICROSTRUCTURE, MODULUS OF ELASTICITY, PROCESSING, STRAIN RATE, TENSILE PROPERTIES, TEST AND EVALUATION, THERMOMECHANICS, THESES

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE