DEVELOPMENT OF ALUMINUM-BASE ALLOYS-SECTION 3

Abstract

The objectives of this alloy development research program were: (1) aluminum alloys with 125,000 psi yield strength, (2) aluminum alloys with yield strengths at least 10% higher than commercial alloys with no sacrifice in resistance to stress corrosion cracking (SCC), and (3) determination of tensile properties at elevated and cryogenic temperatures, impact properties, tear properties, electrical conductivities, hardness, and fatigue strengths. The strengths of some APM alloys are higher than commercial alloys from -112 F to 350 F. Fatigue strengths of smooth specimens of those APM alloys are higher than commercial 7075-T6 and fatigue strengths of notched specimens are at least as high. Impact and tear properties are low but may be improved by further changes in composition, fabrication and heat treatment. When heat treated to maximum strengths, dispersion hardeners raise strengths slightly but the elongation of such alloys is so low that the potential usefulness is very limited. When 'overaged' to lower strengths, however, dispersion hardeners make a very important contribution to resistance to SCC.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1966
Accession Number
AD0487764

Entities

People

  • A. P. Haarr

Organizations

  • Alcoa

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Chemistry
  • Corrosion Resistance
  • Crystal Structure
  • Dispersion Hardening
  • Electrical Conductivity
  • Fabrication
  • Hardening
  • Heat Treatment
  • Materials
  • Mechanical Working
  • Metallurgy
  • Particles
  • Plastic Explosives
  • Powder Metallurgy
  • Tensile Strength
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy