STRAIN AGING AND RHEOTROPIC RECOVERY

Abstract

Specimens of SAE 1340, 3/4-in. -diam hot-rolled rods were prepared. Both prestrain and final ductility measurements were made by determining the specimen diameter on a microcomparator before and after each straining operation. Data are given for the specimens quenched and tempered at 600 deg F, followed by prestretching at room temperature, aging, and final testing at a sub-transition temperature (-210 deg F). The rheotropic recovery produced in a high strength steel was not eliminated by reheating the steel at least up to the initial tempering temperature. The ductility of the rheotropically recovered metal was far more sensitive to strain aging than the same metal at a super- transition temperature when it was not rheotropically embrittled. Strain aging appeared to have only a mild effect on the tensile ductility transition temperature of the heat-treated SAE 1340 used in the investigation.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1953
Accession Number
AD0002617

Entities

People

  • E. J. Ripling

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Army
  • Crystal Structure
  • Ductility
  • Engineering
  • Heat Treatment
  • Low Temperature
  • Materials
  • Materials Science
  • Mechanics
  • Metallurgy
  • Military Research
  • Naval Architecture
  • New York
  • Recovery
  • Tempering
  • Transition Temperature
  • Transitions

Fields of Study

  • Materials science

Readers

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