Abstract This paper presents a study on the performance of circumferentially butt‐welded steel connections under constant tensile‐tensile axial fatigue and cyclic bending tests. The utilizes fibre‐optic based distributed strain sensing to measure strains stresses in regions weld. results confirm desired pure specimen during cycles. suitability monitoring for testing welds is demonstrated. In ad...

Abstract Fatigue and corrosion are two material degradation phenomena that occur in welded steel structures. High-frequency mechanical impact (HFMI) treatment is a post-weld method aims to increase the fatigue strength of details. This paper investigates effect on efficiency this enhancing resistance. More than 150 test results corroded HFMI-treated details collected from several research artic...

Q690E high strength low alloy (HSLA) steel plays an important role in offshore structures. In addition, underwater local cavity welding (ULCW) technique was widely used to repair important offshore constructions. However, the high cooling rate of ULCW joints results in bad welding quality compared with underwater dry welding (UDW) joints. Q690E high strength low alloy steels were welded by mult...

The high strength carbon steels such as API X65 is widely used to build the pipelines. In this study, the corrosion behavior welds region of the gas pipeline was studied. For this purpose, Shield Metal Arc Welding (SMAW) was used to evaluate the proposed method. The welding processes were performed with E6010, E6013, and ER70S-6 electrodes as filler metal and welding carried out in 3 passes by ...

Very often, in order to optimized welded constructions, some of their parts are made of heterogeneous steels. For example, microalloyed steels are in use for cars chassis making and high alloyed steels for different constructions making. From that reason, it’s not rare to find welded joints between ferrite microalloyed and austenitic highalloyed steels. As a rule, these joints are welded by usi...

The combination of GTAW (Gas Tungsten Arc Welding) and SMAW (Shield Metal processes on SA537 Class 2 carbon steel using variations heat input is the main choice to get best quality welded joints. This research aims joint material process with determine results mechanical properties microstructure analysis. experimental method uses a single V butt design, groove angle 60o, root face mm gap 4 as ...

This work is focused on understanding the significant factors affecting fatigue strength of laser-welded butt joints in thin high-strength low-alloy (HSLA) steel. The effects weld profile, imperfections, hardness, and residual stresses were considered to explain results found S-N curves four welded series. showed acceptable although series presented multiple-imperfections. analysis behavior at ...