Weld crack assessments in API X65 pipeline: failure assessment diagrams with variations in representative mechanical properties

被引：27

作者：

Lee, JS ^{[1
]}

Ju, JB

Jang, JI

Kim, WS

Kwon, D

机构：

[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Frontics Inc, Res Inst Adv Mat, Seoul 151744, South Korea

[3] Korea Gas Corp, Ctr Res & Dev, Ansan 425150, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 373卷 / 1-2期

关键词：

failure assessment diagram; API X65 steel; crack assessment; fitness-for-service; heat-affected zone; natural gas pipeline;

D O I：

10.1016/j.msea.2003.12.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Applying accurate material properties to failure assessment diagrams (FAD) for flaw assessment has been problematic, particularly for welded joints in structures such as natural gas pipeline. In a study of API X65-graded natural gas pipeline, we evaluated material properties such as tensile properties and fracture toughness for the base metal, weld metal and heat-affected zone (HAZ), and investigated the influence on flaw assessment of variations in material properties of three regions. In particular, microtensile tests and crack-tip-opening-displacement (CTOD) tests made it possible to construct an HAZ-focused FAD reflecting HAZ properties. It was found that, when crack-like flaws exist in the HAZ, the HAZ-focused FAD yields a more accurate assessment than FADs constructed according to current codes. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：122 / 130

页数：9

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