In situ synchrotron X-ray analysis: Application of high-pressure sliding process to Ti allotropic transformation

Zenji Horita, Daisuke Maruno, Yukimasa Ikeda, Takahiro Masuda, Yongpeng Tang, Makoto Arita, Yuji Higo, Yoshinori Tange, Yasuo Ohishi

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, severe plastic deformation through high-pressure sliding (HPS) was applied for in situ high-energy X-ray diffraction analysis at SPring-8 in JASRI (Japan Synchrotron Radiation Research Institute). Allotropic transformation of pure Ti was examined in terms of temperatures, pressures and imposed strain using a miniaturized HPS facility. The true pressure applied on the sample was estimated from the peak shift. Peak broadening due to local variation of pressure was reduced using white X-rays. The phase transformation from ¡ phase to ½ phase occurred at a pressure of 34.5 GPa. Straining by the HPS processing was effective to promote the transformation to the ½ phase and to maintain the ½ phase even at ambient pressure. The reverse transformation from ½ phase to ¡ phase occurred at a temperature of 3110°C under ambient pressure, while under higher pressure as 34 GPa, the ½ phase remained stable even at 3170°C covered in this study. It was suggested that the reverse transformation from the ½ phase to the ¡ phase is controlled by thermal energy.

Original languageEnglish
Pages (from-to)167-176
Number of pages10
JournalMaterials Transactions
Volume62
Issue number2
DOIs
Publication statusPublished - Feb 1 2021

All Science Journal Classification (ASJC) codes

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

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