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)
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