Microstructural development and cracking behavior of AISI 304 stainless steel tested in time dependent fatigue modes

Journal Article · Sat Jan 01 04:00:00 EST 1983 · J. Eng. Mater. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3225614· OSTI ID:5669604

Ermi, A M; Moteff, J

Transmission and scanning electron microscopy were used to study the substructural development, crack initiation and crack propagation of AISI 304 stainless steel tested in low-cycle fatigue with various hold times. Tests at 593/sup 0/C, a strain rate of 4 E-03 s/sup -1/ and strain ranges of 0.5, 1.0 and 2.0 percent were interrupted at various fractions of the fatigue life, both during rapid hardening and during saturation. Cells developed during the first few percent of the fatigue life, depending on a threshold stress value, below which cells were not observed. The cell size had a different dependence on the relaxed tensile stress during rapid hardening than during saturation. A work-hardening model relating the peak saturation stress to strain and cell size also applied during the late stages of rapid hardening. The number of cycles to initiate a crack of one grain diameter and to propagate the crack to failure were proportionally reduced for one minute tension holds. For a 60 minute tension hold, crack propagation occupied a much smaller fraction of the fatigue life.

• Research Organization: Hanford Engineering Development Laboratory, Richland, WA 99352
• OSTI ID: 5669604
• Journal Information: J. Eng. Mater. Technol.; (United States), Journal Name: J. Eng. Mater. Technol.; (United States) Vol. 105:1; ISSN JEMTA
• 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
CRACK PROPAGATION
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
FATIGUE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NICKEL ALLOYS
SCANNING ELECTRON MICROSCOPY
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
TRANSMISSION ELECTRON MICROSCOPY