[1]屈忆欣 译,李为卫 校对.X80焊管热影响区断裂韧性评价[J].焊管,2012,35(11):65-70.[doi:１００１－３９３８（２０１２）11-0065-06]
　Translated by QU Yixin,Checked by LI Weiwei.Evaluation for Fracture Toughness in Welded X80 Pipes: Experimental Analysis on Mechanical Properties of HAZ[J].,2012,35(11):65-70.[doi:１００１－３９３８（２０１２）11-0065-06]
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X80焊管热影响区断裂韧性评价
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
35
期数:
2012年第11期
页码:
65-70
栏目:
国外焊管
出版日期:
2012-11-28

文章信息/Info

Title:
Evaluation for Fracture Toughness in Welded X80 Pipes: Experimental Analysis on Mechanical Properties of HAZ
文章编号:
１００１－３９３８（２０１２）11-0065-06
作者:
屈忆欣 译; 李为卫 校对
（中国石油集团石油管工程技术研究院，西安 710065）
Author(s):
Translated by QU Yixin;  Checked by LI Weiwei
（CNPC Tubular Goods Research Institute， Xi’an 710065， China）
关键词:
关键词：高强度; UOE钢管; 抗韧性撕裂; SENT试验
Keywords:
Key words: high strength;  UOE pipe;  ductile crack tearing resistance;  SENT testing
分类号:
TG113.25
DOI:
１００１－３９３８（２０１２）11-0065-06
文献标志码:
B
摘要:
环焊缝抗韧性撕裂是基于应变设计的拉伸应变能力评价的一个重要指标。通过单边缺口拉伸试验（SENT）来预测X80钢管手工电弧焊（SMAW）热影响区的断裂韧性。SENT试样缺口根部靠近熔合线。研究结果表明，HAZ材料裂纹尖端张开位移的R曲线几乎与管体一致，韧性裂纹从缺口根部延伸到母材。热影响区的屈服强度、拉伸强度、均匀伸长率、韧性裂纹萌生临界应变都高于母材。此外，在距熔合线2~4 mm处热影响区出现了塑性各向异性，而在接近熔合线处则为塑性各向同性。
Abstract:
Ductile tearing resistance in a girth weld portion is an important property to the tensile strain capacity prediction of strain-based design. The resistance curve is usually characterized by conducting single edge notched tensile （SENT） tests. In this study， SENT tests were carried out to evaluate fracture toughness in heat-affected zone（HAZ） of X80 pipes welded using shielded metal arc welding（SMAW）. The notch root of SENT specimen was located near to the fusion line. The results demonstrated that CTOD R-curve of the HAZ material was almost the same as the pipe body. The ductile crack advanced from the initial notch root to the base metal. For numerical analysis of the fracture toughness by a damage model， mechanical properties such as strength， work-hardening and ductility in the HAZ were revealed using miniature smooth and notch bar specimens. Both yield and tensile strength in the HAZ material were higher than that in the base metal. Uniform elongation of the base metal was significantly lower than that of the HAZ material. The critical strain at ductile crack initiation of the base metal was also smaller than that of the HAZ materials. Moreover， plastic anisotropy appeared in the HAZ， which was 2~4 mm away from the fusion line（FL）， whereas almost isotropic plasticity appeared in the HAZ close to the FL. Numerical analysis is now ongoing using the experimental results obtained in this study， in order to simulate ductile crack resistance of welded X80 pipes.

参考文献/References:

译自：SHINOHARA Y，NAGATA Y，TSURU E，et al. Evaluation for Fracture Toughness in Welded X80 Pipes：Experimental Analysis on Mechanical Properties of HAZ［C］// Proceedings of the Twenty-first（2011）
International Offshore and Polar Engineering Conference，June 19-24，2011，Maui，Hawaii，USA：668-673.
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备注/Memo

备注/Memo:
译者简介：屈忆欣（1984—），女，编辑，主要从事石油管科技信息研究及期刊编辑工作。
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