Dynamic recovery and recrystallization in beta-titanium alloys

T. Furuhara, Y. Toji, H. Abe, T. Maki

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)

Abstract

Microstructure change during hot deformation was studied in β titanium alloys, Ti-10V-2Fe-3Al and Ti-15V-3Cr-3Sn-3Al. After β solution treatments, isothermal compression was performed at various temperatures in the β single-phase and in the (α+β) two-phase region at initial strain rates between 4.2×10-1 ∼- 4.2×10-5 s-1. When the specimens are deformed in the β single phase region, a recovered structure was formed within β grains although discontinuous dynamic crystallization occurs in the vicinity of β grain boundary. When deformation was performed in the (α+β) two-phase region just below the β transus, discontinuous recrystallization around β grain boundary is suppressed due to the pinning effect by grain boundary a precipitate, resulting in a mostly recovered structure. Contrarily, when the specimen is deformed at the temperature where a large amount of α precipitates, dynamic continuous recrystallization occurs uniformly in β matrix, resulting in the formation of (α+β) microduplex structures containing high-angle β boundaries. The size of recrystallized β grain decreases as strain rate increases or deformed temperature is lowered in a good correlation with Zener-Hollomon parameter.

Original languageEnglish
Pages (from-to)655-660
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number1
DOIs
Publication statusPublished - 2003
Externally publishedYes
EventThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain
Duration: 2003 Jul 72003 Jul 11

Keywords

  • Dual phase material
  • Dynamic recovery
  • Dynamic recrystallization
  • Hot deformation
  • Superplasticity
  • β titanium alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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