The separate roles of subgrains and forest dislocations in the isotropic hardening of type 304 stainless steel
Tests on 304 stainless steel were conducted involving first warm working in torsion, then cold working in torsion, and finally measurement of the elevated-temperature yield strength in compression. These tests permitted separation of the effects of subgrain size and forest dislocation density on the isotropic part of the flow stress. Forest dislocation strengthening appears to dominate in this material. Th results are best fitted by a root-mean-square summation of strength terms representing the contributions of solutes, forest dislocations, and subgrain boundaries. The same equation successfully predicts the flow stress during elevated-temperature transient deformation (under both constant strain rate and variable strain rate) from the transient dislocation substructure.
- Research Organization:
- Materials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550
- DOE Contract Number:
- AM03-76SF00326
- OSTI ID:
- 5783402
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 13A; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COLD WORKING
COMPRESSION
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DENSITY
DISLOCATIONS
EQUATIONS
FABRICATION
FLOW STRESS
GRAIN SIZE
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
ISOTROPY
LINE DEFECTS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
PHYSICAL PROPERTIES
SIZE
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRAIN RATE
STRAINS
STRESSES
TORSION
TRANSIENTS
YIELD STRENGTH