Fatigue crack growth behavior of pressure vessel steels and submerged arc weldments in a high-temperature pressurized water environment
- Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
The fatigue crack growth rate (FCGR) properties of SA508 Cl 2a and SA533 Gr A Cl 2 pressure vessel steels and the corresponding automatic submerged arc weldments were developed in a high-temperature pressurized water (HPW) environment at 288{degrees} C (550{degrees} F) and 7.2 MPa (1044 psi) at load ratios of 0.20 and 0.50. The properties were generally conservative compared to American Society of Mechanical Engineers Section XI water environment reference curve. The growth rate of fatigue cracks in the base materials, however, was faster in the HPW environment than in a 288{degrees} C (550{degrees} F) base line air environment. The growth rate of fatigue cracks in the two submerged arc weldments was also accelerated in the HPW environment but to a lesser degree than that demonstrated by the base materials. In the air environment, fatigue striations were observed, independent of material and load ratio, while in the HPW environment, some intergranular facets were present. The greater environmental effect on crack growth rates displayed by the base materials compared the weldments attributed to a different sulfide composition and morphology.
- OSTI ID:
- 7061552
- Journal Information:
- Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA) Vol. 20A:10; ISSN MTTAB; ISSN 0360-2133
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
ALLOYS
ARC WELDING
CHEMICAL COMPOSITION
CONTAINERS
CRACK PROPAGATION
FABRICATION
FATIGUE
HIGH PRESSURE
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MATERIALS TESTING
MECHANICAL PROPERTIES
MORPHOLOGY
PRESSURE VESSELS
PWR TYPE REACTORS
REACTORS
STEELS
SUBMERGED ARC WELDING
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
WELDING