Evaluation of the nugget diameter in spot welded joints between two steel sheets by means of a potential drop technique

Hironori Tohmyoh, Hidetomo Ikarashi, Yoichi Matsui, Yuta Hasegawa, Satoshi Obara

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A potential drop technique which utilizes the electrical circuit used in resistance spot welding is reported. Spot welded samples comprising two steel sheets were inserted between the two Cu electrodes and a constant direct current was supplied between the electrodes. The potential drop between two points, one on each electrode, was determined by analysis for various values of nugget diameter and various values of the contact resistance between the Cu electrodes and the steel sheet sample. The nugget diameter of the spot welded joint could be quantitatively evaluated from the measured potential drop and the equation obtained from the analysis.

Original languageEnglish
Article number085602
JournalMeasurement Science and Technology
Volume26
Issue number8
DOIs
Publication statusPublished - 2015 Aug 1

Keywords

  • contact resistance
  • nugget diameter
  • potential drop technique
  • resistance spot welding
  • steel sheet

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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