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Review: magnetically assisted resistance spot welding

Journal Article · · Science and Technology of Welding and Joining
Currently, the use of advanced high strength steels (AHSSs) is the most cost effective means of reducing vehicle body weight and maintaining structural integrity at the same time. However, AHSSs present a big challenge to the traditional resistance spot welding (RSW) widely applied in automotive industries because the rapid heating and cooling procedures during RSW produce hardened weld microstructures, which lower the ductility and fatigue properties of welded joints and raise the probability of interfacial failure under external loads. Changing process parameters or post-weld heat treatment may reduce the weld brittleness, but those traditional quality control methods also increase energy consumption and prolong cycle time. In recent years, a magnetically assisted RSW (MA-RSW) method was proposed, in which an externally applied magnetic field would interact with the conduction current to produce a Lorentz force that would affect weld nugget formation. This paper is a review of an experimental MA-RSW platform, the mode of the external magnetic field and the mechanism that controls nugget shape, weld microstructures and joint performance. In conclusion, the advantages of the MA-RSW method in improving the weldability of AHSSs are given, a recent application of the MA-RSW process to light metals is described and the outlook for the MA-RSW process is presented.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1413631
Journal Information:
Science and Technology of Welding and Joining, Journal Name: Science and Technology of Welding and Joining Journal Issue: 1 Vol. 21; ISSN 1362-1718
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English

References (10)

Effect of External Constant Magnetic Field on Weld Nugget of Resistance Spot Welded Dual-Phase Steel DP590 journal October 2011
Effects of cone angle of truncated electrode on heat and mass transfer in resistance spot welding journal October 2013
Effect of Magnetic Field on Weld Zone by Spot-welding in Stainless Steel journal January 2006
Numerical Analysis of Transport Phenomena in Resistance Spot Welding Process journal June 2011
The Effects of Post-Weld Cold Working Processes on the Fatigue Strength of Low Carbon Steel Resistance Spot Welds journal January 2005
Impact of External Magnetic Field on Weld Quality of Resistance Spot Welding journal August 2011
Numerical analysis of magnetic fluid dynamics behaviors during resistance spot welding journal March 2007
Microstructure and Mechanical Properties of Resistance Spot Welded Advanced High Strength Steels journal January 2008
Quality improvement in resistance spot weld of advanced high strength steel using external magnetic field journal July 2011
Effect of the magnetic field on the formation of the joint in resistance spot welding journal January 1993

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