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 RWMA -RESISTANCE WELDINGMANUFACTURING ALLIANCE
RWMA Articles and
Research Papers



Thefollowing articles and research papers were published in the WeldingJournal and are available.




Welding Journal Articles

March 2007
Sturdy Exam TablesRely on Robotic Welding
The fabrication of anewly designed medical examination table goes smoothly with roboticresistance welding...continuereading

SUPPLEMENTS
Influence ofLubricants on Electrode Life in Resistance Spot Welding of AluminumAlloys
A lubricant was foundthat almost doubles the eelectrode life of a nonlubricated surface...continuereading

Estimationof Weld Quality in High-Frequency Electric Resistance Welding withImage Processing
An algorithm wasdeveloped to use miage data to predict spot weld quality...continuereading

February2007
Reducing Resistance Welding Costs
An organized approachand detailed analysis are needed to achieve real resistance weldingcost savings...continuereading

InspectingRSW Electrodes and Welds with Laser-Based Imaging
The use of various typesof optical sensors for inspecting RSW electrodes and welds wasstudied...continue reading

MakingResistance Spot Welding Safer
Practical soulutions areproposed to help operators avoid injuries from spot welding machines...continuereading

ReducingShrinkage Voids in Resistance Spot Welds
A study was conducted tohelp develop practical techniques to reduce shrinkage voids anddecrease the potential for interfacial fracture in resistance spotwelds...continue reading
August 2006
Single-SidedResistance Spot Welding for Auto Body Assembly
Hyundai MotorCo. explores use of single-sided resistance spot welding for difficultto access parts...continue reading

Resistance SpotWelding of Coated High-Strength Dual -Phase Steels
Advancedhigh-strength steels offer automobiles the advantages of higherstrength and greater fuel efficiency...continue reading
January2005
ACor DC for Resistance Welding Dual-Phase 600?
Dual-Phase 600'sformability, capacity toabsorb crash energy, and fatique resistance make it a desirable...continue reading

Trends in AluminumResistanceSpot Welding for the

AutoIndustry
Resistance spot weldingis theprimaryjoining technique employed in steel automotive structures because itis...continue reading
July 2005
Power Supply Designed forSmall-Scale Resistance Spot Welding
Resistancespotwelding (RSW) is one of the welding processes thatinvolves the joining of two or more...continue reading

Welding JournalResearch Papers

Characterization of DynamicMechanicalProperties of
Resistance
Welding Machines
A test was devised to determine basic,independent machine parametersto help in the development of a model for predicting the mechanicaldynamics of a resistance welding machine
BY P. WU ET AL.

Development ofRequirements forResistance Spot Welding Dual-Phase (DP600) Steels Part 1 — The Causesof
InterfacialFracture

Weld fracturewas investigated in relation to weldparameters and steel sheet characteristics
BY M. MARYA and X. Q. GAYDEN

Development ofRequirements forResistance Spot Welding Dual-Phase(DP600) Steels Part 2: Statistical Analysesand Process Maps
Weld diameter proved to be the primary factorinfluencing type of weld fracture
BY M. MARYA AND X. Q. GAYDEN

An Experimental StudyDetermines the Electrical Contact Resistance in Resistance Welding
Gleeble® machine experiments evaluatedthe influence of pressure,temperature, and metal properties on resistance welding
BY QUANFENG SONG, WENQI ZHANG, AND NIELS BAY

Penetrator FormationMechanisms during High-Frequency Electric Resistance Welding
The cause of a weld defect in steel pipemanufacture is identifiedBY J.-H. CHOI, Y. S. CHANG, C.-M. KIM, J.-S. OH, AND Y.-S. KIM

ExpulsionPrediction inResistance Spot Welding
A model is proposed for predicting expulsionin resistance spot weldingBY J. SENKARA, H. ZHANG, AND S. J. HU

Resistance SpotWelding ofAluminum Alloyto Steel with Transition Material —From Process to Performance —
Part I: ExperimentalStudy
Weldstrength, failure mode, and fatigue life were compared withself-piercingrivets of the same dissimilar metals combination
BY X. SUN, E. V. STEPHENS, M. A. KHALEEL, H. SHAO, AND M. KIMCHI

Resistance SpotWelding ofAluminum Alloyto Steel with Transition Material — Part II: Finite Element Analyses of
NuggetGrowth

An aluminum-clad steel transition layer canbe used in forming astructural weld between aluminum and steel parts
BY X. SUN AND M. A. KHALEEL

Theoretical Analysisof WeldingCharacteristics during Resistance MashSeam Welding of Sheet Steels
Surfacestrains and approximate thermal cycles can be easily calculatedfor resistance mash seam welding and used to infer joint quality.
BY J. E. GOULD

Effects ofElectrodeDegradation onElectrode Life in Resistance Spot Weldingof Aluminum Alloy 5182
Degradationof electrode tip faces increased the contact area at theelectrode/sheet interface, which resulted in an undersized nugget atthesheet/sheet interface.
BY S. FUKUMOTO, I. LUM, E. BIRO, D. R. BOOMER,AND Y. ZHOU

Analysis of AluminumResistance SpotWelding Processes Using Coupled FiniteElement Procedures
Incrementally coupledfinite element procedures that simulate the resistance spotwelding process are suitable for analyzing a variety of important weldparameters.
BY X. SUN AND P. DONG

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