Substructural development during low cycle fatigue of AISI 304 stainless steel at 649/sup 0/C

Journal Article · Tue Feb 01 04:00:00 EST 1977 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(77)90114-6· OSTI ID:7095070

Nahm, H ^[1]; Moteff, J; Diercks, D R

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1. Univ. of Cincinnati

The substructural development during high temperature low cycle fatigue of type 304 stainless steel has been investigated by transmission electron microscopy. Hour glass type specimens have been tested to different fractions of fatigue life under a total strain range of 2% with a cyclic strain rate of 4 x 10/sup -3/ sec/sup -1/ at 649/sup 0/C. Cells were observed to form within 0.4% of the fatigue life well before the onset of the saturation state which was reached after 4% of the fatigue life. It was also found that the cell intercept size decreases until the saturation state is reached and that the misorientation angle between adjacent cells and the volume fraction occupied by cells increases throughout the fatigue life. The observations are discussed in terms of the recent theoretical predictions.

• OSTI ID: 7095070
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 25:2; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
FATIGUE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
MICROSCOPY
MICROSTRUCTURE
NICKEL ALLOYS
STAINLESS STEEL-304
STAINLESS STEELS
STEELS