Influence of 0.2 wt-%C on the aging response of Ti-15-3

Z. Q. Chen, D. Hu, M. H. Loretto, X. Wu

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Abstract

The effect of aging time and temperature on the microstructure and mechanical properties of Ti-15-3 (Ti-3Cr-3Sn-3Al) with and without carbon addition has been studied. It has been found that carbon addition has a significant effect on the age hardenability and microstructural stability at higher aging temperatures in Ti-15-3, whereas it has a smaller effect at lower aging temperatures, where precipitation of ω appears to influence precipitation of α. The presence of carbides in Ti-15-3 accelerates the precipitation and inhibits the growth of α phase. The gettering of oxygen by the Ti2C precipitates reduces the tendency of grain boundary α precipitation and improves the homogeneity of α precipitation. The significance of these observations is discussed in terms of the effect of the microstructural changes in quenched and aged samples associated with the presence of Ti2C precipitates.

Original languageEnglish
Pages (from-to)756-764
Number of pages9
JournalMaterials Science and Technology
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Jun 2004
Externally publishedYes

Keywords

  • Mechanical properties
  • Microstructure
  • Precipitation hardening
  • Titanium alloy Ti-15-3

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