Hostname: page-component-76fb5796d-9pm4c Total loading time: 0 Render date: 2024-04-25T07:32:03.023Z Has data issue: false hasContentIssue false
  • English
  • Français

EFFECTS OF HOLDING TIME ON HAZ-SOFTENING IN RESISTANCE SPOT WELDED DP980 STEELS

Published online by Cambridge University Press:  01 March 2013

C.J. Martínez-González ,
A. López-Ibarra ,
S. Haro-Rodriguez ,
V.H. Baltazar-Hernandez ,
S.S. Nayak  and
Y. Zhou
C.J. Martínez-González
Affiliation:
Unidad Académica de Ingeniería, Universidad Autónoma de Zacatecas, México Mechanical and Mechatronics Engineering, University of Waterloo, Canada
A. López-Ibarra
Affiliation:
Unidad Académica de Ingeniería, Universidad Autónoma de Zacatecas, México
S. Haro-Rodriguez
Affiliation:
Unidad Académica de Ingeniería, Universidad Autónoma de Zacatecas, México
V.H. Baltazar-Hernandez
Affiliation:
Unidad Académica de Ingeniería, Universidad Autónoma de Zacatecas, México
S.S. Nayak
Affiliation:
Mechanical and Mechatronics Engineering, University of Waterloo, Canada
Y. Zhou
Affiliation:
Mechanical and Mechatronics Engineering, University of Waterloo, Canada
Get access

Abstract

Resistance spot welding (RSW) of dual-phase (DP) steel subjected to various conditions of cooling rate (holding time) is studied in this work. Lap-shear tensile testing is used in order to evaluate the mechanical performance of the weldments. The microstructure is analyzed through optical and electron microscopy and the hardness is obtained through Vickers method. Results indicate an effective tempered region along the sub-critical heat affected zone in all the samples. A broken morphology accompanied with presence of small carbides within tempered martensite phase is consistently observed. Variations in the cooling rate (holding time) indicate minimal effect on the degree of softening and on the mechanical performance of the welds.

Keywords

Weldingsteelstrength
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1485: Symposium 7D – Advanced Structural Materials—2012 , 2012 , pp. 95 - 100
Copyright
Copyright © Materials Research Society 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Committee on Automotive Applications: “Advanced High Strength Steel (AHSS) Application Guidelines”, International Iron and Steel Institute (eds.), Version 4.1, June, pp. 1–4.Google Scholar
Ghosh, P. K., Gupta, P. C., Avtar, R., Jha, B. K. (1990) ISIJ Int. 30 (1990) 233.CrossRefGoogle Scholar
Tong, W., Tao, H., Jiang, X., Zhang, N., Marya, M. P., Hector, L. G., Gayden, X. Q.. Metall. Mater. Trans. 36A (2005) 2651.CrossRefGoogle Scholar
Baltazar Hernandez, V. H., Effect of Martensite Tempering on HAZ-softening and Tensile Properties of Resistance Spot Welded Dual-phase Steels, Ph.D. Thesis, University of Waterloo (Waterloo, 2010).Google Scholar
Marya, M., Wang, K., Hector, L.G., Gayden, X.. J. Manuf. Sci. Eng. 128 (2006) 287.CrossRefGoogle Scholar
Panda, S.K., Kuntz, M.L., Zhou, Y., Sci. Technol. Weld. Joining 14 (2009) 52.CrossRefGoogle Scholar
Baltazar Hernandez, V. H., Kuntz, M. L., Khan, M. I., Zhou, Y.. Sci. Technol. Weld. Join. 13 (2008) 769.CrossRefGoogle Scholar
Khan, M. I., Kuntz, M. L., Zhou, Y.. (2008) Sci. Technol. Weld. Join. 13 (2008) 49.CrossRefGoogle Scholar
Xia, M., Biro, E., Tian, Z., Zhou, Y.. ISIJ Intern., 48 (2008) 809.CrossRefGoogle Scholar
Khan, M. I., Kuntz, M. L., Biro, E., Zhou, Y.. (2008) Mater. Trans. JIM 49 (2008) 1629.CrossRefGoogle Scholar
Panda, S. K., Sreenivasan, N., Kuntz, M. L., Zhou, Y.. (2008) J. Eng. Mater. Technol. 130 (2008) 041003.CrossRefGoogle Scholar
Xia, M., Biro, E., Tian, Z., Zhou, Y.. ISIJ Int. 48 (2008) 809.CrossRefGoogle Scholar
Krauss, G.. Steels, heat treatment and processing principles. ASM International, Materials Park, OH (1990).Google Scholar
Venugopalan, D., Kirkaldy, J. S.. Hardenability concepts with applications to steel. In: Proceedings of a symposium held at Chicago, (1977) pp 249–272.Google Scholar
Baltazar-Hernandez, V.H., Nayak, S.S., Zhou, Y., Met. Mat. Trans. A 42, (2011) 3115.CrossRefGoogle Scholar
Yurioka, N., Suzuki, H., Ohshita, S. and Satio, S.. Weld J., 62 (1983) 147.Google Scholar
RWMA: ‘Resistance welding manual’ 4th ed; 2003, Philadelphia, PA, RWMA, 18-1-18-14.Google Scholar
Recommended practices for test methods for evaluating the resistance spot welding behavior of automotive steels, ANSI/AWS/SAE/D8. 9–97, AWS, Miami, FL, USA, 1997.Google Scholar