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Phase Change Effects on Transport Processes in Resistance Spot Welding

Published online by Cambridge University Press:  31 March 2011

P. S. Wei ,
T. H. Wu  and
S. S. Hsieh
P. S. Wei*
Affiliation:
Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 80424, R.O.C.
T. H. Wu
Affiliation:
Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 80424, R.O.C.
S. S. Hsieh
Affiliation:
Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 80424, R.O.C.
*
* Professor, corresponding author
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Abstract

The effects of distinct properties during phase change on mass, momentum, energy, species, and magnetic field intensity transport in workpieces and electrodes in the course of heating, melting, cooling and freezing periods in AC (alternative current) resistance spot welding are realistically and extensively investigated. Resistance spot welding has been widely used in joining thin workpieces due to its light weight and easy manufacturing. This study accounts for electromagnetic force, heat generations at the electrode-workpiece interface and faying surface between workpieces, and dynamic electrical resistance taking the sum of temperature-dependent bulk resistance of the workpieces and contact resistances at the faying surface and electrode-workpiece interface. The contact resistance is a function of hardness, temperature, electrode force, and surface condition. Instead of dealing with specific materials, this work is a general dimensionless investigation of resistance spot welding of materials with different specific heat and thermal conductivity ratios subject to realistic working parameters. The computed results show that nugget formation is delayed and heat transfer is reduced by increasing solid-to-liquid thermal conductivity and liquid-to-solid specific heat ratio. The corresponding thermal fields and flow patterns are also presented.

Keywords

Resistance spot weldingThermal propertiesNugget formationPhase change
Type
Articles
Information
Journal of Mechanics , Volume 27 , Issue 1 , March 2011 , pp. 19 - 26
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2011

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References

REFERENCES

1.ASM Handbook Committee, Metals Handbook, Ninth Edition, Volume 6 Welding, Brazing, and Soldering, ASM, OH (1983).Google Scholar
2.McDowell, K. H. and Weeks, D. A., “A Practical Approach to Resistance Welding,” British Welding Journal, 6, pp. 381–395 (1959).Google Scholar
3.Kou, S., Welding Metallurgy, Wiley, New York (1987).Google Scholar
4.Han, Z., Indacochea, J. E., Chen, C. H. and Bhat, S., “Weld Nugget Development and Integrity in Resistance Spot Welding of High-Strength Cold-Rolled Sheet Steels,” Welding Journal, 72, pp. 209s–216s (1993).Google Scholar
5.Xu, J., Jiang, X., Zeng, Q., Zhai, T., Leonhardt, T., Farrell, J., Umstead, W. and Effgen, M. P., “Optimization of Resistance Spot Welding on the Assembly of Refractory Alloy 50Mo-50Re Thin Sheet,” Journal of Nuclear Materials, 366, pp. 417–425 (2007).CrossRefGoogle Scholar
6.Zhou, Y., Gorman, P., Tan, W. and Ely, K. J., “Weld-ability of Thin Sheet Metals during Small-Scale Resistance Spot Welding Using an Alternating-Current Power Supply,” Journal of Electronic Materials, 29, pp. 1090–1099 (2000).CrossRefGoogle Scholar
7.Ely, K. J. and Zhou, Y., “Microresistance Spot Welding of Kovar, Steel, and Nickel,” Science and Technology of Welding and Joining, 6, pp. 63–72 (2001).CrossRefGoogle Scholar
8.Xu, J. and Zhai, T., “The Small-Scale Resistance Spot Welding of Refractory Alloy 50Mo-50Re Thin Sheet,” Journal of Metals, 60, pp. 80–83 (2008).Google Scholar
9.Gould, J. E. and Chang, P. H., “Thermal Modeling of Spot Welds,” Journal of Metals, 38, pp. 39–42 (1986).Google Scholar
10.Wang, Y. R., Feng, J. C. and Zhang, Z. D., “Micro-structure Characteristics of Resistance Spot Welds of AZ31 Mg Alloy,” Science and Technology of Welding and Joining, 11, pp. 555–560 (2006).CrossRefGoogle Scholar
11.Wei, P. S., Huang, C. C. and Lee, K. W., “Nucleation of Bubbles on a Solidification Front-Experiment and Analysis,” Metallurgical Materials Transactions B, 34B, pp. 321–332 (2003).CrossRefGoogle Scholar
12.Wei, P. S. and Yeh, F. B., “Factors Affecting Nugget Growth with Mushy-Zone Phase Change during Resistance Spot Welding,” Journal of Heat Transfer (Transactions ASME), 113, pp. 643–649 (1991).CrossRefGoogle Scholar
13.Cunningham, A. and Begeman, M. L., “A Fundamental Study of Projection Welding Using High Speed Photography,” Welding Journal, 44, pp. 381s–384s (1965).Google Scholar
14.Gould, J. E., “An Examination of Nugget Development During Spot Welding, Using Both Experimental and Analytical Techniques,” Welding Journal, 66, pp. 1s–10s (1987).Google Scholar
15.Wei, P. S. and Ho, C. Y., “Axisymmetric Nugget Growth During Resistance Spot Welding,” Journal of Heat Transfer (Transactions ASME), 112, pp. 309–316 (1990).CrossRefGoogle Scholar
16.Feng, J. C., Wang, Y. R and Zhang, Z. D., “Nugget Growth Characteristic for AZ31B Magnesium Alloy during Resistance Spot Welding,” Science and Technology of Welding and Joining, 11, pp. 154–162 (2006).CrossRefGoogle Scholar
17.Podrzaj, P., Polajnar, I., Diaci, J. and Kariz, Z., “Influence of Welding Current Shape on Expulsion and Weld Strength of Resistance Spot Welds,” Science and Technology of Welding and Joining, 11, pp. 250–254 (2006).CrossRefGoogle Scholar
18.Roberts, W. L., “Resistance Variations During Spot Welding,” Welding Journal, 30, pp. 1004–1019 (1951).Google Scholar
19.Greenwood, J. A., “Temperatures in Spot Welding,” British Welding Journal, 8, pp. 316–322 (1961).Google Scholar
20.Wei, P. S., Wang, S. C. and Lin, M. S., “Transport Phenomena During Resistance Spot Welding,” Journal of Heat Transfer (Transactions ASME), 118, pp. 762–773 (1996).CrossRefGoogle Scholar
21.Li, Y. B., Lin, Z. Q., Hu, S. J. and Chen, G. L., “Numerical Analysis of Magnetic Fluid Dynamics Behaviors during Resistance Spot Welding,” Journal of Applied Physics, 101, pp. 1–10 (2007).Google Scholar
22.Wang, S. C. and Wei, P. S., “Modeling Dynamic Electrical Resistance during Resistance Spot Welding,” Journal of Heat Transfer (Transactions ASME), 123, pp. 576–585 (2001).CrossRefGoogle Scholar
23.Bennon, W. D. and Incropera, F. P., “A Continuum Model for Momentum, Heat and Species Transport in Binary Solid-Liquid Phase Change Systems - I. Model Formulation,” International Journal for Heat and Mass Transfer, 30, pp. 2161–2170 (1987).CrossRefGoogle Scholar
24.Patankar, S. V., Numerical Heat Transfer and Fluid Flow, Hemisphere, New York (1980).Google Scholar