Investigation Of Spot Welding In Similar Joins Of Martensitic Advanced High Strength Steels (AHSS)

مهندسی متالورژی و مواد

Article 7, Volume 31, Issue 2 - Serial Number 22, September 2020, Pages 69-80   

Document Type: Original Articles

DOI: 10.22067/ma.v31i1.68608

Authors

Mehran Tadayonsaidi^{* 1}; babak ghorbanian²

¹, Karaj Branch, Islamic Azad University, Karaj, Iran

²Department of Materials Engineering, Amirkabir University of Technology, Tehran, Iran.

Abstract

The mechanical properties of weld were studied by the use microhardness testing and tensile shear testing. These days to reduce vehicle weight use from advanced high strength steels. The most important method for joining this sheets is resistance spot welding (RSW). The welding current and the welding time are the most important parameters of welding.  In this research, similar welds of martensitic advanced high strength steels have been studied which they had joined with RSW. Results are showing, the critical current is 9.5KA and in this current the failure mode is changing from interface mode to periphery mode. The most failure force occurs in 10.5KA and this force is about 26.5KN.

Keywords

Resistance Spot Welding; Similar Weld; Martensitic Advanced High Strength Steels; Mechanical properties; Failure Mode

Supplementary Files

7- tadayon-Revised11.pdf

References

1. . اویسی م.، بنی مصطفی عرب ن.، پایگانه غ.، "پیش بینی و بهینه سازی اندازه قطر دکمه جوش در جوشکاری مقاومتی نقطه ای بر ورق مورد استفاده در صنعت کشتی سازی با استفاده از طراحی آزمایشات"، اولین همایش ملی توسعه سواحل مکران و اقتدار دریایی جمهوری اسلامی ایران، کد مقاله4005، بهمن (1391).
2. Chao Y.j. "Ultimate Strength and Failure Mechanism of Resistance Spot Weld Subjected to Tensile, or combined, Tensile/Shear Loads ", Journal of Engineering Materials and Technology , Vol. 125.No. 2, pp. 125-133, (2003).
3. Pouranvari M., Asgari H., " Effect of weld nugget size on overload failure mode of resistance spot ", Journal of Science and Technology of Welding and Joining, Vol. 12.No.3, pp. 223-231, (2003).
4. Agate S., Hang H.A., "Effect of welding current in spot welding", Welding Journal, Vol.7.No. 2, pp. 179-183, (2003).
5. Dodders S., Bryghmads T. Herman's C. Liefooghe H. Van der Auweraer, Desmet W. Finite Elem. Anal Des. Vol. 6.No. 2, pp. 670-682, (2006).
6. American Welding Society, AWS Handbook, Chapter17, (1997).
7. Sun W., Stephens X., Khaleel F.V., "Effect of fusion zone size and failure mode on peak load and energy absorbtion of advanced high strength steel spot welds under lap shear loading conditions", Eng Failure, Vol. 15.No. 4, pp. 356-367, (2008).
8. Tomorrow M.D., "Resistance Spot Welding of Coated High Strength Dual Phase Steel", Welding Journal, Vol. 85.No. 8, pp. 162-177, (2006).
9. Khan E.,"Spot Welding of Advanced High Strength Steels", Mechanical Engineering, University of Waterloo: Ontario. Vol. 27.No. 3, pp. 128-139, (2007).
10. Ghosh P.K., Guppy P.C, Paw O., Avpyr R., Dived V., "Influence of Weld Thermal Cycle on Properties of Flash Butt Welded Vn-Cr-Vo Dual‌phase Steel" , ISIJ International, Vol. 33.No. 7, pp. 33-50, (1993).
11. Miller Welds, Handbook of RS V. (2005).
12. Towade G.K.C., Brew S.D., add Tee A., "Robust Schedule for Spot Welding Zinc Coated Advance High Strength Automotive Steel". SEEA. Vol. 11.No. 3, pp. 225-240, (2005).
13. Pouramvari M., "Factors affecting mechanical properties of resistance spot welds", Materials Science and Technology, Vol. 13.No. 6, pp 65-82, (2009).
14. Tee H., Kim N., Tee T.S., "Overload Failure Curve and Fatigue Behavior of Spot- Welded Specimen", Engineering Fracture Mechanics, Vol. 72. No. 8, pp.72-83, (2005).
15. Khan E., Kumrz E., Her Y., Chap K., Slerlhmer N., "Monitoring the Effect of RSV Pulsing on HAS using FEE Software". SAE Technical Paper, Vol. 8.No. 3, pp. 92-108, (2007).
16. Hofmam K., Serest V., Ornerier CL, Vilwaire S., Procurer E., "EC or DC_ for resistance welding Dual Phase DP600", Welding Journal, Vol. 6.No. 3, pp. 84-95, (2005).
17. Kumitige K., Yamaulhi N., Take T.L., Nagger N., "Softening in Weld Heat Affected Zone of Dual Phase Steel Sheet for Automotive Wheel Rim”, SAE Transactions, Vol. 21.No.3, pp. 1063-1067, (2004).
18. Jim H., "Microstructure Evolution During Processing of Dual Phase and TRIP Steels", id Materials Engineering. University of British Columbia. pp34-45, (2004).
19. Pouranvari M., Marashi S.P.H., Safanama D.S., "Failure mode transition in AHSS resistance spot welds", Materials Science and Engineering A , Vol. 528.No. 29, pp. 8337– 8343, (2011).