Critical fracture toughness of weld metal structure in submerged arc welding of EH36 steel

被引：0

作者：

Liu C. ^{[1
]}

Deng C. ^{[1
,2
]}

Wang S. ^{[3
]}

Gong B. ^{[1
,2
]}

机构：

[1] School of Materials Science and Engineering, Tianjin University, Tianjin

[2] Tianjin Key Laboratory of Advanced Joining Technology, Tianjin

[3] Chiwan Sembawang Engineering Co., Ltd., Shenzhen

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 03期

关键词：

Acicular ferrite; Fracture toughness; Proeutectoid ferrite; Weld metal;

D O I：

10.12073/j.hjxb.2019400081

中图分类号：

学科分类号：

摘要：

SENT (Single Notched Tensile) specimen was used to study the critical fracture toughness of acicular ferrite (AF) and proeutectoid ferrite (PF) in the EH36 submerged arc welding weld metal. The results showed that the fracture toughness of AF is higher than that of PF. The main reason is that the AF has a high density of dislocation, crack blunting occurs due to plastic deformation under loading. In contrast, PF, whose dislocation density is small, is relatively pure and uniform. The heterogeneity of microstructures lead to a great dispersion of the fracture toughness of the weld metal, which is mainly due to the different fracture toughness and heterogeneous distribution of microstructures in crack tip. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.

引用

页码：107 / 110

页数：3

共 7 条

[1] Zuo B., Zhang Y., Huo L., Et al., Fracture toughness of large thickness weld joint in offshore platform, Transactions of the China Welding Institution, 25, 6, (2004)
[2] Wu H., Jia G., An C., Experimental study on fracture toughness of multilayer weld joint based on microstructure, Journal of Mechanical Strength, 37, 1, pp. 58-64, (2015)
[3] Huang Y., Zhou W., Effects of crack front curvature on J-R curve testing using clamped SE(T) specimens of homogeneous materials, International Journal of Pressure Vessels and Piping, 134, pp. 112-127, (2015)
[4] Sumpter J.D.G., Turner C.E., Method for laboratory determination of Jc, (1976)
[5] Fracture control for pipeline installation methods introducing cyclic plastic strain, (2006)
[6] Tyson W.R., Shen G., Gianetto J.A., Et al., Development of a low-constraint SE(T) toughness test, Key Engineering Materials, 488-489, pp. 126-129, (2011)
[7] Guo Z., Wen Y., Hu S., Et al., The influence of structure type for acicular ferrite steel, Material Development and Application, 22, 6, pp. 5-8, (2007)

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