Abstract
This paper is a review of the recent studies of small-scale resistance spot welding (SSRSW) of a refractory alloy 50Mo-50Re thin sheet (0.127 mm thick). The effects of seven important welding parameters—hold time, electrode material, electrode shape, ramp time, weld current, electrode force, and weld time—were studied systematically in an attempt to optimize the welding quality. The diameter of a weld nugget was found to be only 30–40% of the electrode diameter in SSRSW. This was due to the relatively low electrode force used in SSRSW compared with the high electrode force employed in large-scale resistance spot welding (LSRSW) where the diameter of the nugget was almost 100% of the electrode diameter. Large pores often found in the nugget during SSRSW could result from shrinkage during solidification due to fast cooling or fromdue to agglomeration of residual volatile elements absorbed during powder metallurgy processing of the material.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
J. Xu et al., “Optimization of Resistance Spot Welding on the Assembly of Refractory Alloy 50Mo-50Re Thin Sheet,” J. Nucl. Mater., 366 (2007), pp. 417–425.
V.V. D’yachenko et al., NASA Technical Memorandum, NASA TM-77491 (1970).
D.P. Kramer et al., Proceedings of 35th Intersociety Energy Conversion Engineering Conference (Piscataway, NJ: IEEE, 2000), paper no.: AIAA-2000-2971.
D. Steinmeier, “Downsizing in the World of Resistance Welding,” Welding Journal, 77(7) (1998), p. 39.
B.H. Chang, M.V. Li, and Y. Zhou, “Comparative Study of Small Scale and ‘Large Scale’ Resistance Spot Welding,” Sci. Technol. Weld. Join., 6(5) (2001), p. 273.
K.J. Ely and Y. Zhou, “Microresistance Spot Welding of Kovar, Steel, and Nickel,” Sci. Technol. Weld. Join., 6(2) (2001), p. 63.
E.P. Degarmo, J.T. Black, and R.A. Kohser, editors, Materials and Processes in Manufacturing, 9th edition (New York: John Wiley & Sons, 2003).
E.E. Ferrenz, A. Amare, and C.R. Arumainayagam, “An Improved Method to Spot-Weld Difficult Junctions,” Rev. Sci. Instrum., 72 (2001), p. 4474.
L.B. Lundberg, “Tungsten and Refractory Metals 3,” ed. A. Bose and R.J. Dowding (Princeton, NJ: MPIF: 1995), p. 145.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Xu, J., Zhai, T. The small-scale resistance spot welding of refractory alloy 50Mo-50Re thin sheet. JOM 60, 80–83 (2008). https://doi.org/10.1007/s11837-008-0096-x
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11837-008-0096-x