Processing of Aluminum Alloy 2090 for Superplasticity

Abstract

Existing superplastic forming techniques for A1 alloys rely on deformation at temperatures of 500 C to achieve the desired ductilities. The A1 alloy 2090 (A1-Li-Cu-Zr) has been successfully fabricated by such techniques, but at temperatures where cavitation during formation may significantly reduce the mechanical properties of the final product. It has been previously shown that cavitation can be effectively suppressed by forming at lower temperatures. The purpose of this research is to investigate the applicability of thermomechanical processing methods (developed at NPS for A1-Mg-X alloys) to produce a refined microstructure capable of supporting superplasticity at lower temperatures in A1 2090. Aluminum alloys, Copper, Lithium, Thermomechanically processing, Superplasticity, Theses.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1988
Accession Number
ADA201865

Entities

People

  • Gary E. Groh

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Cold Working
  • Ductility
  • Engineering
  • Grain Size
  • Manufacturing
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Engineering
  • Mechanical Properties
  • Metals
  • Physical Properties
  • United States
  • United States Naval Academy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design