Early-stage α-phase and Ti2Cu phase formation in a ternary Ti-V-Cu alloy

Hoi Pang Ng, Arun Devaraj, Soumya Nag, Philip Nakashima, Colleen Bettles, Mark Gibson, Hamish Fraser, Rajarshi Banerjee, Barry Muddle

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


The early-stage precipitations of α-phase and Ti2Cu intermetallic compound have been characterized in a ternary Ti-25V-3Cu alloy. Using aberration-corrected scanning transmission electron microscopy (STEM) and three-dimensional atom probe (3-DAP) .detailed examination of the crys-tallographic structures and compositional partitioning of the nucleation sites was carried out. These techniques have enabled accurate phase identifications of precipitate embryos having a size in the nanometer range, and the geometrical arrangement of the different phases. The results indicate that the α and the intermetallic compound tend to form a mutually-conjugated structure governed by a specific orientation relationship. Upon continued isothermal aging, twin related variants of both phases develop in the β matrix.

Original languageEnglish
Title of host publicationProceedings of the 12th World Conference on Titanium (TI-2011)
Subtitle of host publication19-24 June, 2011; Beijing China
EditorsLian Zhou, Hui Chang, Yafeng Lu, Dongsheng Xu
Place of PublicationBeijing China
PublisherScience Press
Number of pages4
ISBN (Electronic)9787030338952
ISBN (Print)9787030338990
Publication statusPublished - 2012
EventThe World Conference on Titanium 2011 - China National Convention Center, Beijing, China
Duration: 19 Jun 201124 Jun 2011
Conference number: 12th


ConferenceThe World Conference on Titanium 2011
Abbreviated titleTi 2011
Internet address


  • Atom probe
  • Nucleation
  • Phase transformation
  • Transmission electron microscopy

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