Strain Rate Effects and Temperature History Effects for Three Different Tempers of 4340 VAR Steel

Abstract

A series of experiments is described in which specimens of AISI 4340 VAR steel are deformed in shear at temperatures ranging from -190C to 20C. The tests were performed in a torsional Kolsky bar at quasi-static and dynamic strain rates. Before testing all the specimens were normalized, austenitized and tempered either at 200 C, 425 C or 600 C, representing hardnesses of 55, 44, and 33, respectively, on the Rockwell C scale. In addition to constant temperature and constant strain rate tests, a number of experiments was performed to study history effects in these tempers. For this purpose a prestrain was imposed at one temperature and strain rate, followed by continued straining at a new temperature or at a new strain rate.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1984
Accession Number
ADA146372

Entities

People

  • J. Duffy
  • S. Tanimura

Organizations

  • Brown University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Carbon Steels
  • Chemical Composition
  • Creep
  • Hardening
  • Hardness
  • Heat Treatment
  • Iron
  • Mechanical Properties
  • Metals
  • Military Research
  • Static Tests
  • Strain Rate
  • Stress Strain Relations
  • Stresses
  • Universities
  • Yield Strength

Readers

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