Optimization of the parameters of low-carbon steel (EN10130) welding using friction stir welding method

Document Type: Persian

Authors

1 MSc, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

2 Assistant professor, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

3 Assistant professor, Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

4 MSc, Department of Mechanical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Iran

Abstract

 
Friction-stir welding process is a novel method of solid state welding, which produces heat due to friction between the pin, the shoulder and the workpiece. This heat causes a paste area. Shoulder pressure and pin spin cause edges integration and lead to welding. In this study, firstly, the feasibility of welding of steel sheet (EN10130) with a thickness of 1.5mm has been tested by 58 experiments. After making perfect welds, the ranges of 500-1000 RPM and 30-160 mm/min were selected as the suitable upper and lower levels, respectively, for rotational speed and linear speed. To achieve a maximum tensile strength, 29 tests were designed by using the Box-Benken method considering specified levels of the parameters. Then, the response surface methodology was used for optimization of the parameters. Results showed that the optimal outputs and experimental data were in good agreement, which indicate the adequacy of the design of experiments and optimization predict results. Micro-hardness tests, metallography and normal tensile test were carried out on three series of plates produced with the most appropriate tensile strength and elongation. Results showed that heat-affected zone weaked the sheet of advancing side compared to other welding zones.

Keywords


[1] Burak M., Meran C., The effect of tool rotational and traverse speed on friction stir weldability of AISI 430 ferritic stainless steels, Materials and Design, 33, 2012, pp. 376–383.

[2] محمدی زهرانی ا ، طاهری م، زمردیان ا، ارزیابی قابلیت شکل پذیری ورق های فولادی کم کربن St14  درتولید بدنه خودرو، مهندسی مکانیک دانشگاه آزاد واحد شهر مجلسی، شماره 1، 1386، ص 83-89 (مقاله نشریه).

[3] غفارپور م، بررسی فرم­پذیری ورق­های جوش­خورده­ترکیبی آلیاژهای نامتجانس آلومینیوم جوشکاری شده به روشاصطکاکی-اغتشاشی(FSW)، دانشگاه امیر کبیر،1390.

[4] Sabooni S., Karimzadeh F., Enayati M.H., Ngan A.H.W., Friction-stir welding of ultrafine grained austenitic 304L stainless steel produced by martensitic thermomechanical processing, Materials & Design, 76, 2015, pp. 130–140.

[5] Husain Md.M., Sarkar R., Pal T.K., Prabhu N., Ghosh M., Friction Stir Welding of Steel: Heat Input, Microstructure, and Mechanical Property Co-relation, Journal of Materials Engineering and Performance, 24, 2015, pp. 3673-3683.

[6] Jafarzadegan M., Feng A.H., Abdolah-zadeh A., Saeid T., Shen J., Asadi H., Microstructural characterization in dissimilar friction stir welding between 304 stainless steel and st37 steel, Materials characterization, 74, 2012, 28-41.

[7] Ghosh M., Kumar K., Mishra R.S., Friction stir lap welded advanced high strength steels: Microstructure and mechanical properties, Materials Science and Engineering A, 528, 2011, pp. 8111– 8119

[8] Cho H.H., Han H.N., Hong S.T., Park J.H., Kwon Y.J., Kim S.H., Russell J., Microstructural analysis of friction stir welded ferritic stainless steel, Materials Science and Engineering A, 528, 2011, pp. 2889–2894.

[9] A. Falahi, A. Eghbali,  " Evaluating the Parameters Affecting the Distribution of Thickness in Cup Deep drawing of ST14 Sheet", Mech. Dep. Amirkabir University of Technology, ISBN: 978-1-61804-115-9.

[10] Chung Y.D., Fujii H., Ueji R., Tsuji N., Friction stir welding of high carbon steel with excellent toughness and ductility, Scripta Materialia, 63, 2010, pp. 223–226.

[11] ASTM, “Standard Test Methods for Tension Testing of Metallic Material”, E8, Vol. 03.01, 2004.

[12] Ahn B.W., Choi D.H., Kim D.J., Jung S.B., Microstructures and properties of friction stir welded 409L stainless steel using a Si3N4 tool, Materials Science and Engineering A, 532, 2012, pp. 476– 479.

[13] Fujii H., Cui L., Tsuji N., Maeda M., Nogi K., Friction stir welding of carbon steels", Materials Science and Engineering A, 42, 2006, pp. 50–57.

 

[14] G.E.P. Box, K.B. Wilson, "On The Experimental Attainment of Optimum Conditions" J. of the Royal Statistical Society. Series B 13. pp. 1–45, 1951.

[15] D.C. Montgomery, "Design and Analysis of Experiments" Sixth Edition. John Wiley & Sons. Inc. ISBN. 0-471-48735-X. 2005.

[16] W.M. Thomas, E.D. Nicholas, J. Needham, M. Murch, P. Templesmith, C. Dawes, "Friction stir butt welding", International Patent Application. No. PCT/GB92/02203. December. 1991.

 [17]  نوروزی س ، شاکری م، کریمی ن، مقایسه ریزساختار و خواص مکانیکی اتصال آلیاژ آلومینیوم به روش روش اصطکاکی-اغتشاشی در هوا و زیر آب، سیزدهمین کنفرانس ملی جوش و بازرسی، تهران، 1392، 146-152.