An Experimental Investigation on Comparison of the Similar and Dissimilar Resistance Spot Welding of St12 and Galvanized Steel using Design of Experiments

Subject Areas : Mechanical Engineering

Mahmoud  Moradi ¹ (Department of Mechanical Engineering, Faculty of Engineering, Malayer University, Malayer, Iran)
Hadi  Abdollahi ² (Faculty of Mechanical Engineering, Urmia university of Technology, Urmia, Iran)
Ali  Khorram ³ (Department of Mechanical Engineering, University of KNToosi, Iran)

Received: 2017-12-24 Accepted : 2018-03-04 Published : 2018-06-01

Keywords: Resistance spot welding, Tensile-Shear strength, Optimization, Design of Experiments, Dissimilar welding,

Abstract :

In the present research, similar and dissimilar resistance spot welding (RSW) process of St12 and galvanized steel sheets with thickness of 0.9 mm was investigated. The experiments were carried out based on the statistical design of experiments (DOE) approach to investigate the effect of RSW parameters on the welding quality, achieving the mathematical regression equations and predicting the new results. Welding time and electrode force were considered as the input process variables while the tensile-shear strength of the joints was considered as the process response. By comparing three RSW types, galvanized steel has the highest tensile-shear strength. Statistical analysis shows that tensile-shear strength is increased with increasing electrode force and welding time. Verification experiments for three types of RSW joints were carried out in order to analyse the obtained results via software. Good agreement between the verification tests and the optimization results revealed that the statistical modelling would be appropriate for RSW process. Welding time (T)  = 5 s and electrode force (P)  = 925 N, welding time (T) = 5 s and electrode force (P) = 1100 N and welding time (T) = 3 s and electrode force (P) = 925 N were obtained as the optimum settings for similar RSW of St12, dissimilar RSW of St12 to galvanized steel and similar RSW of galvanized steel, respectively.

References:

[1]   Thomson, E., “Electrical World, McGraw-Hill Publishing Companyˮ, New York, 1886, pp. 307.

[2]                 Degarmo, E. P., Black, J. T., and Kohser, R. A., “Materials and Processes in Manufacturing, Macmillan Publishing Companyˮ, New York, 1988, pp. 890.

[3]   Montgomery, D. C., “Design and Analysis of Experimentsˮ, Wiley, New York, 2009.

[4]   Moradi, M., Abdollahi, H., “Statistical Modelling and Optimization of the Laser Percussion Microdrilling of Thin Sheet Stainless Steel”, Journal of Lasers in Engineering, In press.

[5]     Moradi, M., Mehrabi, O., Azdast, T., and Benyounis, K. Y., “Enhancement of Low Power CO2 Laser Cutting Process for Injection Molded Polycarbonate”, Optics & Laser Technology, Vol. 96, 2017, pp. 208-218.

[6]     Kang, J., Chen, Y., Sigler, D., Carlson, B., and David, S., “Effect of Adhesive on Fatigue Property of Aural2 to AA5754 Dissimilar Aluminum Alloy Resistance Spot Welds”, Engineering Failure Analysis, Vol. 69, 2016, pp. 57-65.

[7]     Prashanthkumar, V. K., Venkataram, N., Mahesh, N. S., and Kumar, S., “Process Parameter Selection for Resistance Spot Welding through Thermal Analysis of 2 mm CRCA Sheets”, Procedia Materials Science, Vol. 5, 2014, pp. 369-378.

[8]     Yoon, H. K., Min, B. H., Lee, C. S., Kim, D. H., Kim, Y. K., and Park, W. J., “Strength Characteristic on Resistance Spot Welding of Al Alloy Sheets by Taguchi Method”, International Journal of Modern Physics, Vol. 20, No. 5, 2006, pp. 4297-4302.

[9]     Thakur, A. G., Nandedkar, V. M., “Application of Taguchi Method to Determine Resistance Spot Welding Conditions of Austenitic Stainless Steel AISI 304”, Journal of Scientific and Industrial Research, Vol. 69, 2010, pp. 680-683.

[10]  Luo, Y., Liu, J., Xu, H., Xiong, C., and Liu, L., “Regression Modeling and Process Analysis of Resistance Spot Welding on Galvanized Steel Sheet”, Materials & Design, Vol. 30, 2009, pp. 2547-2555.

[11]  Hooda, A., Dhingra, A., and Sharma, S., “Optimization of MIG Welding Process Parameters to Predict Maximum Yield Strength in AISI 1040ˮ, International Journal of Robotic Engineering, Vol. 1, No. 3, 2012, pp. 203-204.

[12]  Mittal, M., Dwivedi, D. K., “Statistical Analysis of the Influence of Input Process Parameters on Characteristics of Weld Bonds of Al5052 H32 Alloy Using a Box–Behnken Design”, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, Vol. 226, No. 6, 2012, pp. 1001-1017.

[13]  Yuan, X., Li, C., Chen, J., Li, X., Liang, X., and Pan, X., “Resistance Spot Welding of Dissimilar DP600 and DC54D Steelsˮ, Journal of Materials Processing Technology, Vol. 239, 2017, pp. 31-41.

[14]  Spitz, M., Fleischanderl, M., Sierlinger, R., Reischauer, M., Perndorfer, F., and Fafilek, G., “Surface Lubrication Influence on Electrode Degradation During Resistance Spot Welding of Hot Dip Galvanized Steel Sheets”, Journal of Materials Processing Technology, Vol. 216, 2015, pp. 339-347.

[15]  Feng, Y., Li, Y., Luo, Z., Ling, Z., and Wang, Z., “Resistance Spot Welding of Mg to Electro-Galvanized Steel with Hot-Dip Galvanized Steel Interlayer”, Journal of Materials Processing Technology, Vol. 236, 2016, pp. 114-122.

[16]  Becker, N., Gilgert, J., Petit, E. J., and Azari, Z., “The Effect of Galvanizing on the Mechanical Resistance and Fatigue Toughness of a Spot Welded Assembly Made of AISI410 Martensite”, Materials Science and Engineering: A, Vol. 596, 2014, pp. 145-156.

[17]  Zhang, W., Sun, D., Han, L., and Li, Y., “Optimised Design of Electrode Morphology for Novel Dissimilar Resistance Spot Welding of Aluminium Alloy and Galvanised High Strength Steel”, Materials & Design, Vol. 85, 2015, pp. 461-470.

[18]  Hamidinejad, S. M., Kolahan, F., and Kokabi, A. H., “The Modeling and Process Analysis of Resistance Spot Welding on Galvanized Steel Sheets Used in Car Body Manufacturing”, Materials & Design, Vol. 34, 2010, pp. 759-767.

[19]  Razmpoosh, M. H., Shamanian, M., and Esmailzadeh, “The Microstructural Evolution and Mechanical Properties of Resistance Spot Welded Fe–31Mn–3Al–3Si TWIP Steel”, Materials and Design, Vol. 67, 2015, 571-576.

[20]  Aslanlar, S., Ogur, A., Ozsarac, U., and Ilhan, E., “Welding Time Effect on Mechanical Properties of Automotive Sheets in Electrical Resistance Spot Welding”, Materials and Design, Vol. 29, 2008, pp. 1427-1431.

[21]  Khodabakhshi, F., Kazeminezhad, M., and Kokabi, A. H., “Mechanical Properties and Microstructure of Resistance Spot Welded Severely Deformed Low Carbon Steel”, Material Science and Engineering A, Vol. 529, 2011, pp. 237-245.

[22]  Hou, Z., Kim, I. S., Wang, Y., Li, C., and Chen, C., “Finite Element Analysis for the Mechanical Features of Resistance Spot Welding Process”, Journal of Materials Processing Technology, Vol. 185, 2007, pp. 160-165.

[23]  Azzouzi, D., Benkhedda, Y., and Boumeddane, B., “Thermal and Metallographic Study of Nugget Size Development in Resistance Spot Welding of 304L Stainless Steel”, Metallurgical Research & Technology, Vol. 113, 2016, pp. 237-245.

[24]  Safari, M., Mostaan, H., “Experimental Investigation of the Effects of Process Parameters on the Strength of Eutectoid Steel (AISI 1075) Sheet Resistance Spot Welds”, Metallurgical Research & Technology, Vol. 113, 2016, pp. 237-245.

[25]  Khuri, A. I., Cornell, J. A., Response Surfaces: Designs and Analyses, 2nd ed., CRC press, New York, 1996.

[26]  Azadi, M., Azadi, S., Zahedi, F., and Moradi, M., “Multidisciplinary Optimization of a Car Component Under NVH and Weight Constraints Using RSM”, International Mechanical Engineering Congress and Exposition, Vol. 15, 2009, pp. 315-319.

[27]  Moradi, M., Mohazabpak, A., “Statistical Modelling and Optimization of Laser Percussion Micro-Drilling on Inconel 718 Sheet Using Response Surface Methodology”, Journal of Lasers in Engineering, In press.

[28]  Derringer, G., Suich, R., “Simultaneous Optimization of Several Response Variables”, Journal of Quality Technology, Vol. 12, 1980, pp. 214-219.

[29]  Moradi, M., Golchin, E., “Investigation on the Effects of Process Parameters on Laser Percussion Drilling Using Finite Element Methodology, Statistical Modelling and Optimization”, Latin American Journal of Solids and Structures, Vol. 14, 2017, pp. 464-484.