METALLURGICAL VARIABLES AFFECTING FRACTURE TOUGHNESS IN HIGH-STRENGTH SHEET ALLOYS.

Abstract

Using precracked Charpy tests supplemented by center-notched tensile tests, the fracture toughness of five low-alloy and three stainless steel high-strength alloys in sheet form was measured primarily as a function of heat treat ment variables such as austenitizing and temper ing temperatures. The low alloy steels studied were D6AC (two heats)4340 (martensitic and bainitic conditions), X200 (0.35 and 0.40% carbon), 300M and H11; and the stainless steels were AM 355, PH 15-7Mo and 301. For 4340, in the bainitic condition, the influence of sub sequent deformation and aging on fracture tough ness was also determined. I addition, pre liminary studies of the effect of welding both before and after heat treatment on the toughness of H11, 300M and 4340 were carried out. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1963
Accession Number
AD0411766

Entities

People

  • C.e. Hartbower
  • G.m. Orner

Tags

DTIC Thesaurus Topics

  • Alloys
  • Chemical Compounds
  • Heat Treatment
  • High Strength Alloys
  • Low Alloy Steels
  • Materials
  • Metallic Compounds
  • Stainless Steel
  • Steel
  • Toughness

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy
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