Fracture toughness and fatigue properties of 5083-O plate and 5183 welds for liquefied natural gas applications
The results of a number of investigations on the properties of 5083-O plate and weldments of various thicknesses have been summarized. The data show that the tensile properties and toughness of 5083-O plate at room and subzero temperatures remain about constant or decrease modestly with an increase in thickness from 1 to 9 in. and that the properties of 5083-O plate formed into a spherical contour by the Alcoa 570 process are essentially the same as those of as-rolled 5083-O plate. Both strength and toughness are higher at -260 and -320/sup 0/F than at room temperature. The strength and toughness of 5183 welds at room temperature, -260, and -320/sup 0/F are equivalent to those of the parent plate. The high toughness of these products at those temperatures has been demonstrated by tests of relatively large-scale specimens, all of which have fractured by ductile tearing; conservative engineering estimates of K/sub Ic/ and K/sub c/ have been made based upon these results and those published in the literature. The fatigue crack propagation characteristics of these materials have been established and found to be largely unaffected by temperature, thickness, orientation, or location in the weld. Crack growth rates are faster in moist air than in dry air.
- Research Organization:
- Alcoa Labs., Alcoa Center, PA
- OSTI ID:
- 7264680
- Journal Information:
- Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Vol. 579; ISSN ASTTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
032000* -- Natural Gas-- Transport
Handling
& Storage
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
DUCTILITY
ENERGY SOURCES
FATIGUE
FLUIDS
FOSSIL FUELS
FRACTURE PROPERTIES
FUEL GAS
FUELS
GAS FUELS
GASES
JOINTS
LIQUEFIED NATURAL GAS
LOW TEMPERATURE
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NATURAL GAS
PLATES
SHIPS
TANKER SHIPS
TENSILE PROPERTIES
TRANSPORT
WELDED JOINTS
YIELD STRENGTH