Microstructure and mechanical characterization of friction stir welded high strength low alloy steels

Friction stir welding (FSW) is a promising technique to join HSLA steels without the problems encountered during fusion based welding processes. In the present work, 3mm thick HSLA plates were successfully welded using FSW. A tool made of tungsten-rhenium alloy was used in this work. The relationshi...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2017-02, Vol.687, p.39-46
Main Authors: Ramesh, R., Dinaharan, I., Kumar, Ravi, Akinlabi, E.T.
Format: Article
Language:English
Subjects:
Bainite
Bend strength
Ferrite
Friction stir welding
High strength low alloy steel
High strength low alloy steels
Mechanical properties
Microstructure
Rhenium
Tensile strength
Tungsten base alloys
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Summary:Friction stir welding (FSW) is a promising technique to join HSLA steels without the problems encountered during fusion based welding processes. In the present work, 3mm thick HSLA plates were successfully welded using FSW. A tool made of tungsten-rhenium alloy was used in this work. The relationship between microstructure and tensile strength was studied under various welding conditions i.e. change in traverse speed (57–97mm/min). The microstructure of the weld nugget revealed the presence of upper bainite and fine ferrite phases. The amount of upper bainite reduced with increase in traverse speed. EBSD images showed a reducing trend for grain size. The details of hardness, tensile strength and bending test were reported.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2017.01.050