MATEC Web of Conferences
Volume 159, 2018The 2nd International Joint Conference on Advanced Engineering and Technology (IJCAET 2017) and International Symposium on Advanced Mechanical and Power Engineering (ISAMPE 2017)
|Number of page(s)||5|
|Published online||30 March 2018|
Mechanical and microstructural characterization of ST 37 butt joints by friction stir
Department of Mechanical Engineering, Diponegoro University. Jl. Prof. Sudharto, SH 50275, Semarang, Indonesia
* Corresponding author: firstname.lastname@example.org
The aim of this research is to investigate mechanical and microstructure characteristic of ST 37 Friction Stir Welded (FSW) butt joints. The rolled plate of ST 37 steel was used as the base material. Tungsten carbide (20 mm on diameter) was used as the tool. The FSW process was conducted on a CNC milling machine. FSW joints were produced at 1500 and 2000 rpm of rotational speeds variation and the transverse speed is constan at 40 mm/min. Furthermore, the influence of rotational speed on the microstructure and mechanical properties of the joints were investigated based on parameters mentioned above. The tensile test was done based on JISZ 2241 standard. Microhardness was investigated based on ASTM E 384. Joint microstructure was also analyzed by optic microscopy. As a result, FSW joint at 2000 rpm tool rotation shows higher tensile strength, yield strength and percentage of elongation in compare to 1500 rpm rotaton speed. In addition, its tensile strength is about 5 % lower than Base Material (BM) which its ductility decreases up to 30 %.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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