FRACTURE TOUGHNESS EVALUATION OF TITANIUM, ALUMINUM, AND STEEL.

Abstract

The plane strain fracture toughness of 2014-T6 aluminum alloy, 6Al-4V titanium alloy, and 4340 steel has been investigated at room temperature and at -75F, using the single edge notched specimen. Data for the 2014-T6 aluminum alloy, 6Al-4V titanium alloy, and 4340 steel, quenched and tempered to Rockwell C 50 hardness, showed the plane strain fracture toughness to be insensitive to testing temperature. The specimens of 4340 steel, quenched and tempered to Rockwell C 30 hardness, were too small for accurate plane strain fracture toughness values, but the results indicate that no transition occurred over the range of testing temperature investigated. The cycle-annealed specimens of 4340 steel indicated a sensitivity of plane strain fracture toughness to testing temperature. These data show the superiority of the quenched and tempered structure to mixed structure, even though both are at the same hardness level. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1966
Accession Number
AD0632926

Entities

People

  • John W. Forney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Hardness
  • Sensitivity
  • Test And Evaluation
  • Titanium
  • Titanium Alloys
  • Toughness
  • Transitions

Fields of Study

  • Materials science

Readers

  • Inertial Navigation Systems.
  • Materials Science (Mechanical Engineering).