PLANE STRAIN FRACTURE TOUGHNESS OF LARGE D6AC STEEL SPECIMENS,

Abstract

Eighteen 2 x 2 x 24-in bars of Ladish D6ac rolled steel were tested in a bend test fixture to obtain a plane strain fracture toughness index K sub Ic. One bar was used to develop a calibration curve needdddeed to calculate this parameter. The other seventeen were tested to failure in bending. Of these, eight received the recommended heat treatment referred to herin as AusBay, with air cooling after tempering; four received a heat treatment with no Aus-Bay and four received a heat treatment incorporating the AusBay and a furnace coll to 500 F after second temper. The first set (Aus-Bay) had the best fracture toughness; the third set was almost as fracture tough as the first set (except for the -65 F data), and the second set (Aus-Bay, Furnace Cool) had the least fracture toughness. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1964
Accession Number
AD0437250

Entities

People

  • R. J. Urban

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Annealing
  • Calibration
  • Heat Treatment
  • Tempering
  • Test Fixtures
  • Toughness

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.