Microstructure and mechanical properties of friction-stir welded St52 steel joints
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第12期
论文作者：Tevfik Kü?ük?mero?lu Semih M.Aktarer
文章页码：1457 - 1464
摘 要：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.
Tevfik Kü?ük?mero?lu1，Semih M.Aktarer2
1. Department of Mechanical Engineering, Karadeniz Technical University2. Department of Automotive Technology, Recep Tayyip Erdogan University
摘 要：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.
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