Fatigue-Crack-Growth Behavior of Two Pipeline Steels

Bilin Chen, Gongyao Wang, Shuying Chen, Govindarajan Muralidharan, Doug Stalheim, An Cheng Sun, E. Wen Huang, Peter K. Liaw

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The fatigue-crack-growth behavior of two types of pipeline steels, Alloy B [Fe–0.05C–1.52Mn–0.12Si–0.092Nb, weight percent (wt%)] and Alloy C (Fe–0.04C–1.61Mn–0.14Si–0.096Nb, wt%), have been investigated. Compact-tension (CT) specimens have been tested at various frequencies (10, 1, and 0.1 Hz) and different R ratios (0.1 and 0.5, R = Pmin/Pmax where Pmin is the minimum applied load, and Pmax is the maximum applied load) in air. It is concluded that higher R ratios lead to faster crack-growth rates (FCGRs), while frequency does not have much influence on FCGRs. Moreover, Alloy B tends to have better fatigue resistance than Alloy C under various test conditions in air.

Original languageEnglish
Pages (from-to)2028-2039
Number of pages12
JournalAdvanced Engineering Materials
Volume18
Issue number12
DOIs
StatePublished - Dec 1 2016

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