Joining characteristics of β-titanium wires with electrical resistance welding

Masahiro Iijima, William A. Brantley, Toshihiro Yuasa, Isao Kawashima, Itaru Mizoguchi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The goal of this research was to investigate the effects of different conditions for electrical resistance welding of β-titanium orthodontic wires. Three electrode types were used with a range of power settings on an electrical resistance welding machine to join β-titanium wires (Resolve, GAC International). Forces that caused bond failures for joined specimens were obtained with tensile loading, and the values were compared using one-way ANOVA and the Tukey test (α = 0.05). Metallurgical phases in the joint region were determined by micro-X-ray diffraction. Mean tensile forces for bond failure ranged from 5 to 20 kgf for the eight specimen groups and were dependent on electrode type and power setting. All X-ray diffraction peaks in the joint region were indexed to β-titanium. Superior bond strength was achieved with the use of wide electrodes. The absence of phases other than β-titanium in the joint area suggests that the electrical resistance welding may not adversely affect clinically important mechanical properties. Scanning microscope observations indicated that the localized permanent deformation and the formation of an undesirable equiaxed grain structure occurred with the use of narrow electrodes.

Original languageEnglish
Pages (from-to)378-384
Number of pages7
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume85
Issue number2
DOIs
Publication statusPublished - 2008 May 1
Externally publishedYes

Keywords

  • Electrodes
  • Microstructure
  • Titanium (alloys)

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

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