HAADF-STEM study of phase separation and the subsequent alpha phase precipitation in a beta-Ti alloy

Yuman Zhu, Su-Ming Zhu, Matthew Simon Dargusch, Jian Feng Nie

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17 Citations (Scopus)

Abstract

The α phase precipitation via phase separation (β → β′ + β) in the Ti–25Nb–3Mo–3Zr–2Sn (wt.%) alloy has been studied by scanning transmission electron microscopy. The observations clearly show that α phase nucleates at the β/β′ interface and grows into the β′ phase by ledges. To accommodate the precipitation of α phase, the β′ phase undergoes both morphological and structural changes. The crystallographic relationships between the contiguous α, β′ and β phases are identified from the atomic-scale images and are compared with those calculated from the crystallographic models.
Original languageEnglish
Pages (from-to)46 - 49
Number of pages4
JournalScripta Materialia
Volume112
DOIs
Publication statusPublished - Feb 2016

Keywords

  • Titanium alloys
  • Phase separation
  • Precipitation
  • Crystallography
  • HAADF-STEM

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