SUSTAINED LOAD CRACKING RESISTANCE OF GRADE 23/29 TITANIUM GTA-WELDED PIPE JOINTS

被引：0
|
作者：
Leonard, Andrew J. [1 ]
Schutz, Ronald W. [1 ]
Porter, Richard L. [1 ]
机构：
[1] BP Explorat Operating Co Ltd, Sunbury On Thames TW16 7LN, Middx, England
来源：
PROCEEDINGS OF THE 27TH INTERNATIONAL CONFERENCE ON OFFSHORE MECHANICS AND ARCTIC ENGINEERING - 2008, VOL 5 | 2008年
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D O I：
暂无
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
Grade 23 and/or 29 titanium alloy pipe and forgings are typically butt-welded together in the fabrication of offshore riser components such as tapered stress joints (TSJs) for top-tensioned risers; and as hang-offs for dynamic catenary risers. Although Grade 29 titanium base metal in a relevant wrought/forged product form has already been evaluated in regards to sustained-load cracking (SLC) resistance, minimal data is available to ensure that the SLC resistance of typical GTA butt-welded joints in these thicker-wall titanium alloy components will also meet design requirements. As part of a TSJ production weld qualification, conservative fracture-mechanics based SLC tests were conducted at room temperature on IG-position machine GTA butt-welded Grade 23 titanium pipe utilizing Grade 29 titanium filler metal. Test results revealed no significant SLC susceptibility in the weld and a minor effect in HAZ metal, producing K(SLC) values similar to K(Q) values. These values safely meet typical TSJ fracture mechanics requirements, and are consistent with published SLC information on this alloy system.
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页码：23 / 30
页数：8
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