Propagation Behavior of Small Cracks in 304 Stainless Steel Under Biaxial Low-Cycle Fatigue at Elevated Temperature [Book Chapter]

Conference · Mon Oct 14 00:00:00 EDT 1991 · Advances in Multiaxial Fatigue

DOI:https://doi.org/10.1520/stp24809s· OSTI ID:5241398

Ogata, T. ^[1]; Nitta, A. ^[1]; Blass, J. J. ^[2]

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1. Central Research Institute of Electric Power Industry (CRIEPI), Tokyo (Japan)
2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

To investigate the initiation and propagation behavior of small cracks and the relationship between crack propagation and fatigue life, strain-controlled in-phase and 90° out-of-phase axial-torsional fatigue tests were conducted at 550°C, using tubular specimens of 304 stainless steel with and without surface notches. Each test was interrupted at frequent intervals to make a film replica of the outer surface of the specimen for examination with an optical microscope. Most of the fatigue life was spent in the propagation of small cracks less than 2 mm long. Regardless of loading conditions, the crack propagation rate correlated well with the equivalent shear strain range defined as a function of shear strain range and normal strain range on the plane of maximum shear strain range. The biaxial low-cycle fatigue life could be estimated from the relationship between the crack propagation rate and the equivalent shear strain range.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5241398
• Report Number(s): CONF-911048--1; ON: DE91018863; ISBN: 978-0-8031-1862-1
• Journal Information: Advances in Multiaxial Fatigue, Journal Name: Advances in Multiaxial Fatigue
• Publisher: American Society of Mechanical Engineers (ASTM)
• Country of Publication: United States
• Language: English

Related Subjects

304 stainless steel
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRACK PROPAGATION
CRACKS
ELECTRON MICROSCOPY
FATIGUE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MICROSCOPY
NICKEL ALLOYS
SCANNING ELECTRON MICROSCOPY
SERVICE LIFE
SHEAR
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS
TESTING
biaxial low-cycle fatigue
crack initiation
crack propagation
fatigue life prediction
high temperature