EFFECT OF LOW-TEMPERATURE ON THE FATIGUE PROPERTIES OF TWO HSLA (HIGH STRENGTH LOW ALLOY) PIPELINE STEELS |
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| Authors: | M R KRISHNADEV R GHOSH† A GALIBOIS‡ |
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| Affiliation: | Associate Professor, Department of Metallurgy, Laval University, Quebec G1K 7P4, Canada;Research Associate, Department of Metallurgy, Laval University, Quebec G1K 7P4, Canada;Professor, Department of Metallurgy, Laval University, Quebec G1K 7P4, Canada |
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| Abstract: | Abstract In order to understand the fatigue behaviour of HSLA pipeline steels under lowtemperature Arctic environments, a study has been undertaken to evaluate the influence of low-temperature on the high cycle fatigue behaviour of two candidate steels, namely (i) Cb Mo "Acicular Ferrite" steel developed by Climax-Ipsco and (ii) high-Cb HSLA steel developed by the Molybdenum Corporation of America. Results indicate that both the steels have reasonably good fatigue properties and that their fracture morphology and fatigue-induced dislocation substructures are quite complex. Design data based on room temperature fatigue properties would be adequate for the low-temperature application of these steels. |
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