Transmission electron microscopy observations on Cu-Ti alloy systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Phase separation behaviors of a quenched Cu-3.0at%Ti alloy, as well as crystallographic structures of Cu-20.7at%Ti alloy have been studied using transmission electron microscopy. The furnace-cooled Cu-20.7at%Ti alloy are composed of Cr-Cu4Ti (Ni4Mo-type) and β-Cu 4Ti (Au4Zr-type) with the orientation relationship of (011)α//(110)β, [100]α//[001] β. As-quenched Cu-3.0at%Ti alloy showed a modulated structure with the modulation length of about 4 nm. When aged at 723K for 8 hr, the αCu4Ti phase emerges within the modulated or tweed-like microstructure. Prolonged aging results in the growth of the Ce-Cu4Ti particles and the loss of coherency. It is likely that as-quenched Cu-3.0at%Ti alloy decomposes spinodally at 723K, followed by polymorphous ordering; though the present study did not exclude, as an alternative path, a decomposition mechanism based on the catastrophic nucleation.

Original languageEnglish
Title of host publicationNew Frontiers of Processing and Eng. in Advanced Materials - Proc. of the Int. Conf. on New Frontiers of Process Science and Eng. in Advanced Materials, PSEA' 04 - The 14th Iketani Conference
PublisherTrans Tech Publications Ltd
Pages163-168
Number of pages6
ISBN (Print)0878499806, 9780878499809
DOIs
Publication statusPublished - 2005 Jan 1
Externally publishedYes
EventInternational Conference on New Frontiers of Process Science and Engineering in Advanced Materials, PSEA' 04 - Kyoto, Japan
Duration: 2004 Nov 242004 Nov 26

Publication series

NameMaterials Science Forum
Volume502
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherInternational Conference on New Frontiers of Process Science and Engineering in Advanced Materials, PSEA' 04
Country/TerritoryJapan
CityKyoto
Period04/11/2404/11/26

Keywords

  • Age-hardening
  • Cu-Ti alloy
  • Ordering
  • Spinodal decomposition

ASJC Scopus subject areas

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

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