The Effects of Tempering and Test Temperature on the Dynamic Fracture Initiation Behavior of an AISI 4340 VAR Steel

Abstract

An investigation was conducted into the effect of tempe ring, test temperature and loading rate on the fracture initiation behavior of an AISI 4340 VAR steel. The fracture initiation test were conducted by stress wave loading of a prefatigued circumferential crack in a notched round bar. The geometry provides for plane strain conditions at the fracture site, and the instrumentation gives records of average stress at the fracture site and of crack opening displacement, both as functions of time. Keywords: Fracture, 4340 VAR steel, fracture toughness, dynamic effects, temperature effects, microstructural effects.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1988
Accession Number
ADA201606

Entities

People

  • J. Duffy
  • K. Cho
  • Sang‐Hyun Lee
  • Y. C. Chi

Organizations

  • Brown University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Dynamic Tests
  • Electron Microscopes
  • Electron Microscopy
  • Embrittlement
  • Engineering
  • Geometry
  • Heat Treatment
  • Instrumentation
  • Materials
  • Mechanical Properties
  • Mechanics
  • Microscopy
  • Stress Strain Relations
  • Stress Waves
  • Stresses
  • Transmission Electron Microscopy

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).