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

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA192333

Entities

People

  • Procopios T. Spiropoulos

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Chemistry
  • Cold Working
  • Computer Programs
  • Creep
  • Crystal Structure
  • Grain Size
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Modulus Of Elasticity
  • Physical Properties
  • Solid Solutions
  • Strain Rate
  • Tensile Strength
  • Tensile Testing
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.