AC-Permeability Measurement of Strain-Induced Martensite during Tensile Deformation of Trip Steels.

Abstract

An AC magnetic permeability method has been developed for continuously monitoring the course of the strain-induced martensitic transformation during tensile deformation of TRIP steels. True stress-strain and magnetic measurements were made simultaneously during both inhomogeneous deformation (Luders-band formation) and uniform flow. Calibration with quantitative optical metallography and density measurements indicates that the AC-permeability technique yields accurate curves for the volume fraction martensite versus plastic strain. The transformation curve in high-strength TRIP steel has a sigmoidal shpae consistent with that reported for lower strength austenitic steels. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1977
Accession Number
ADA040419

Entities

People

  • Gregory B. Olson
  • Hans E. Band
  • Morris Azrin

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Calibration
  • Chemistry
  • Data Analysis
  • Frequency
  • Frequency Meters
  • Geometry
  • Instrumentation
  • Magnetic Fields
  • Magnetic Properties
  • Materials
  • Materials Laboratories
  • Materials Science
  • Measurement
  • Mechanics
  • Military Research
  • Steel

Readers

  • Materials Science (Mechanical Engineering).
  • Plasma Physics / Magnetohydrodynamics