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The clarification of α″ phase precipitate from β phase in Ti-15Mn alloy by mismatch theory

  • Haoyin Zhang
  • , Xingjun Liu
  • , Shuiyuan Yang
  • , Hengxing Jiang
  • , Zhan Shi
  • , Mujin Yang
  • , Cuiping Wang*
  • *Corresponding author for this work
  • Xiamen University

Research output: Contribution to journalArticlepeer-review

Abstract

The precipitation and growth of α″ phase from β phase in Ti-15Mn alloy after solid solution process was experimentally investigated. After heat treatment, the Ti-15Mn alloy consisted of α″ and β phases. The α″ and β phases were analyzed by X-ray diffraction, transmission electron microscopy and Fourier transforms. The results show a coherent relationship between α″ phase and β-Ti matrix, which is (2 0 0)α″ // (1 1 0)β and (0 2 0)α″ // (1 1¯ 0)β. Through calculating one-dimensional and two-dimensional mismatch, it comes to a conclusion that the two-dimensional mismatch of α″ phase and β-Ti matrix is 1.73%. It means that the α″ phase can efficiently precipitate from β-Ti matrix. Furthermore, it grows along the resultant vectors direction which determined by one-dimensional mismatch energy.

Original languageEnglish
Pages (from-to)138-141
Number of pages4
JournalMaterials Letters
Volume202
DOIs
StatePublished - 1 Sep 2017
Externally publishedYes

Keywords

  • Fourier transforms
  • Growth
  • Mismatch
  • Vectors
  • α″ Phase

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