Elevated temperature backstresses and the dislocation microstructure in type 304 stainless steel
- Lawrence Livermore National Lab., CA (USA)
This investigation studied the relationship between the dislocation microstructure and the backstress in type 304 stainless steel deformed at 750 and 850 C ({approximately} 0.6 and 0.7 Tm), at a strain-rate of 4.0 {times} 10{sup {minus}4} s{sup {minus}1}. Hollow torsion specimens were deformed to various transient strains between 0.05 and 0.45 at these conditions. Bauschinger effect tests were performed within this strain regime. Backstresses were calculated from these tests. Solid torsion specimens were deformed at the same temperature-strain rate combination as the hollowed (Bauschinger effect test) specimens. The solid specimens were quenched at strains identical to those at which Bauschinger effect tests were performed on the hollow specimens. The microstructures of the quenched specimens were examined by TEM. The correlation between the backstress and the microstructure revealed that the backstress or kinematic hardening in 304 stainless steel, at these temperatures, does not (in contrast to other investigations) appear to be strongly dependent on the microstructural heterogeneity provided by subgrain or cell boundaries.
- OSTI ID:
- 5308558
- Report Number(s):
- CONF-840909--
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN 0197-1689; ISSN TMPSA
- 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
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DISLOCATIONS
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
MATERIALS
MICROSCOPY
MICROSTRUCTURE
NICKEL ALLOYS
RESIDUAL STRESSES
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS
STRAIN RATE
STRESSES
TEMPERATURE EFFECTS
TRANSMISSION ELECTRON MICROSCOPY