SEDL / STP / STP556-EB / STP33127S

Fatigue Crack Growth in Aluminum Alloy 5083-0 Thick Plate and Welds for Liquefied Natural Gas Tanks

Kelsey, RA
Engineering associate, engineer, and manager, Alcoa Laboratories, Aluminum Company of America, New Kensington, Pa.

Nordmark, GE
Engineering associate, engineer, and manager, Alcoa Laboratories, Aluminum Company of America, New Kensington, Pa.

Clark, JW
Engineering associate, engineer, and manager, Alcoa Laboratories, Aluminum Company of America, New Kensington, Pa.

Pages: 27    Published: Jan 1974

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Abstract

Data are presented on fatigue crack growth rates in thick plate of aluminum alloy 5083-0 for spherical liquefied natural gas cargo tanks. The investigation included: (1) determination of fatigue crack growth rates at room temperature and -320°F; (2) comparison of fatigue crack growth in welds with that in parent material; (3) establishment of the rate and direction of growth of surface flaws under tension and combined tension and bending; and (4) comparison of the rate of growth of surface flaws in plates under spectrum loading with calculated rates based on data from constant amplitude loading of compact tension specimens.