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http://dx.doi.org/10.5574/KSOE.2015.29.3.241

Flow Stress Properties of Electric Resistance Welded Small-Sized Subsea Pipeline Subjected to Temperature and Strain Rate Variations  

Kim, Younghun (Department of Naval Architecture, Ocean & IT Engineering., Kyungnam University)
Park, Sung-Ju (Department of Naval Architecture and Ocean Engineering, Inha University)
Yoon, Sung-Won (Department of Naval Architecture and Ocean Engineering, Inha University)
Choung, Joonmo (Department of Naval Architecture and Ocean Engineering, Inha University)
Publication Information
Journal of Ocean Engineering and Technology / v.29, no.3, 2015 , pp. 241-248 More about this Journal
Abstract
A subsea pipeline for oil/gas transportation or gas injection is subjected to extreme variations in internal pressure and temperature, which can involve a strain rate effect on the pipeline material. This paper describes the flow stress characteristics of a pipeline material called API 5L X52N PSL2, using and experimental approach. High-speed tensile tests were carried out for two metal samples taken from the base and weld parts. The target temperature was 100℃, but two other temperature levels of –20℃and 0℃ were taken into account. Three strain rates were also considered for each temperature level: quasi static, 1/s, and 10/s. Flow stress data were proposed for each temperature level according to these strain rates. The dynamic hardening behaviors of the base and weld metals appeared to be nonlinear on the log-scale strain rate axis. A very high material constant value was required for the Cowper-Symonds constitutive equation to support the experimental results.
Keywords
Flow stress; High speed tensile test; Base material; Weld material; Strain rate;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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