Effects of Nitrogen and Titanium on Mechanical Properties and Annealed Structure of the Copper Weld Metal by Ar-N2 Gas Metal Arc Welding

Takeshi Kuwana, Hiroyuki Kokawa, Akira Honda

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Oxygen-free copper plates were welded with copper and copper-titanium alloy electrode wires using argon-nitrogen gas mixture shielding. The effects of the nitrogen percent (N2%) in the shielding gas and the titanium content (Ti%) of the electrode wire on mechanical properties and annealed structures of the weld metal were examined. The Vickers hardness increases with Ti% of the electrode wire. The yield stress and the tensile strength of the weld metal increase with Ti% of the electrode wire, while the elongation and the reduction of area show maximum at about 0.5%Ti in the wire. Those tensile properties of the weld metal are independent of N2% in the shielding gas. β' precipitates are observed in some of the weld metals annealed at 573—1173 K for 3.6 ks. The precipitation is the most remarkable after annealing at 700~800 K, and the amount of the precipitates increases with increase of Ti% in the wire and with decrease of N2% in the shielding gas. The Vickers hardness increases with the amount of the precipitates.

Original languageEnglish
Pages (from-to)753-759
Number of pages7
Journalquarterly journal of the japan welding society
Volume4
Issue number4
DOIs
Publication statusPublished - 1986 Jan 1

Keywords

  • Annealing
  • Ar-N2 Gas Shielding
  • Copper Weld Metal
  • Tensile Properties
  • Titanium
  • Titanium Nitride
  • Vickers Hardness
  • β'Precipitation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Metals and Alloys

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