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2018-01-01
Mohammadijoo, M., Collins, L., Henein, H., Ivey, D.G.
Pipeline failures can be severe events that impact both society and industry. The oil spills in North Battleford, Saskatchewan in 2016 and the gas rupture in Beardmore, Ontario in 2011 are examples of recent pipeline failures in Canada. Pipeline failures have led to pipe fabricators developing...
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Characterization of HAZ of API X70 Microalloyed Steel Welded by Cold-wire Tandem Submerged Arc Welding.
Download2016-01-01
Mohammadijoo, M., Kenny, S., Ivey, D.G., Collins, L., Henein, H.
High strength low carbon microalloyed steels may be adversely affected by the high heat input and thermal cycle that they experience during tandem submerged arc welding (TSAW). The heat affected zone (HAZ), particularly the coarse grained heat affected zone (CGHAZ), i.e., the region adjacent to...
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Characterization of martensite-austenite constituents and micro-hardness in intercritical reheated and coarse-grained heat affected zones of API X70 HSLA steel
Download2017-01-01
Mohammadijoo, M., Valloton, J., Collins, L., Henein, H., Ivey, D.G.
The thermal cycles that high strength low alloy (HSLA) low carbon steels experience during welding inevitably affect the microstructure and mechanical properties of the weld joints. It is generally agreed that the coarse-grained heat affected zone (CGHAZ) and the intercritical reheated...
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Evaluation of Cold-Wire Addition Effect on Heat Input and Productivity of Tandem Submerged Arc Welding for Low-Carbon Microalloyed Steels
Download2016-01-01
Mohammadijoo, M., Ivey, D.G., Collins, L., Henein, H.
The addition of a cold wire in conventional tandem submerged arc welding (TSAW), i.e., the CWTSAW process, is proposed to improve the productivity of pipeline manufacturing by increasing welding travel speed and deposition rate, while retaining adequate joint geometry without increasing the...
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2018-01-01
Mohammadijoo, M., Collins, L., Lazor, R., Henein, H., Ivey, D.G.
The structural performance of microalloyed steel weld joints is essentially dependent on the microstructural characteristics of the heat-affected zone (HAZ). However, the microstructure is adversely impacted by the heat input of the welding process. As such, an X70 microalloyed steel was welded...
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Influence of Cold-Wire Tandem Submerged Arc Welding Parameters on Weld Geometry and Microhardness of Microalloyed Pipeline Steels
Download2016-01-01
Mohammadijoo, M., Henein, H., Collins, L., Ivey, D.G.
Tandem submerged arc welding with an additional cold wire (CWTSAW) is being developed for pipeline manufacturing to improve productivity in terms of deposition rate and travel speed of welding. An appropriate understanding of the welding conditions to guarantee requisite weld geometry, appearance...