Accession Number:

ADA422908

Title:

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

Descriptive Note:

Technical Paper

Corporate Author:

AEROJET SACRAMENTO CA

Report Date:

2004-03-01

Pagination or Media Count:

7.0

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.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Properties of Metals and Alloys
  • Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE