Effect of Sc and Heat Treatment on Microstructure and Properties of a 7XXX DC Cast Alloy

Abstract

Four developmental 7XXX series alloys modified with Sc, Zr and other dispersoid-forming elements were produced by continuous direct chill (DC) casting. Microstructure and mechanical properties were evaluated in both the longitudinal and transverse directions at room and cryogenic temperatures. The homogenization, solution treatment and aging schedules were optimized to obtain superior mechanical properties. In particular, the Sccontaining cast alloys showed tensile properties similar or even superior to the properties of a wrought 7075-T6 alloy. The strengthening mechanisms responsible for this improvement, optimal Sc content and the processing parameters are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2004
Accession Number
ADA422908

Entities

People

  • J. Tatalovich
  • O.N. Senkov
  • R. B. Bhat
  • S. V. Senkova

Organizations

  • Aerojet Rocketdyne Holdings

Tags

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Annealing
  • Electron Microscopes
  • Grain Size
  • Heat Energy
  • Heat Treatment
  • Heating
  • High Temperature
  • Microstructure
  • Precipitation
  • Scanning Electron Microscopes
  • Solid Solutions
  • Tensile Properties
  • Tensile Strength
  • Transverse

Fields of Study

  • Materials science

Readers

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