Isothermal Age-hardening Behaviour in a Au-1.6 wt% Ti Alloy

Hyung Il Kim, Hyo Joung Seol, Dong Hwa Bae, Ji Young Shim, Yukyo Takada, Osamu Okuno

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

This study describes research with a view to developing a new age-hardenable, high-carat dental gold alloy with better biocompatibility by addition of a small quantity of titanium to gold. The relationship between isothermal age-hardening and phase transformation of the Au-1.6 wt% Ti alloy was investigated by means of hardness testing, X-ray diffraction study, scanning electron microscopic observation and energy dispersive spectroscopy. The hardening in the initial stage of ageing seemed to be attributable to the continuous precipitation of the Au4Ti ordered phase in the supersaturated α solid solution matrix. The overaging with softening was attributed mainly to the formation of precipitates at the grain boundaries, which grew to bright lamellae and seemed to be composed of the Au4Ti phase.

Original languageEnglish
Pages (from-to)32-41
Number of pages10
JournalDental materials journal
Volume18
Issue number1
DOIs
Publication statusPublished - 1999

Keywords

  • Age-hardening
  • AuTi ordered phase
  • Gold alloy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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