Microstructure and mechanical properties of friction-stir welded St52 steel joints

Tevfik K&#252;&#231;&#252;k&#246;mero&#287;lu; Semih M. Aktarer; G&#252;ven &#304;peko&#287;lu; G&#252;rel &#199;am

doi:10.1007/s12613-018-1700-x

Volume 25 Issue 12

Dec. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(12): 1457-1464

Tevfik Küçükömeroğlu, Semih M. Aktarer, Güven İpekoğlu, and Gürel Çam, Microstructure and mechanical properties of friction-stir welded St52 steel joints, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1457-1464. https://doi.org/10.1007/s12613-018-1700-x

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Tevfik Küçükömeroğlu, Semih M. Aktarer, Güven İpekoğlu, and Gürel Çam, Microstructure and mechanical properties of friction-stir welded St52 steel joints, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1457-1464. https://doi.org/10.1007/s12613-018-1700-x

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Research Article

Microstructure and mechanical properties of friction-stir welded St52 steel joints

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Corresponding author:
Tevfik Küçükömeroğlu E-mail: guven.ipekoglu@iste.edu.tr
Received: 22 March 2018; Revised: 22 June 2018; Accepted: 13 July 2018

Abstract

Abstract

The aim of this work is to investigate the mechanical properties and microstructures of friction-stir welded (FSWed) St52 structural steel joints. In this study, St52 steel plates with a thickness of 4 mm were butt-welded by friction-stir welding (FSW) using a tungsten carbide tool having a conical pin. The microstructure of the welded zone consists of equiaxed fine ferrite, grain boundary ferrite, Widmanstatten ferrite, and aggregates of ferrite + cementite. The microhardness measurements showed that the hardness of the welded zone was significantly higher than that of the base metal. The FSWed St52 joint exhibited a significant strength overmatching in the weld region and a strength performance similar to or slightly higher than that of the base plate.
- friction-stir welding;
- St52 steel;
- microstructure;
- mechanical properties

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