TY - JOUR
T1 - In situ synchrotron X-ray analysis
T2 - Application of high-pressure sliding process to Ti allotropic transformation
AU - Horita, Zenji
AU - Maruno, Daisuke
AU - Ikeda, Yukimasa
AU - Masuda, Takahiro
AU - Tang, Yongpeng
AU - Arita, Makoto
AU - Higo, Yuji
AU - Tange, Yoshinori
AU - Ohishi, Yasuo
N1 - Funding Information:
This work was supported-by a Grant-in-Aid for Scientific Research (A) from the MEXT, Japan (JP19H00830). One of the authors (TM) would like to acknowledge a Grant-in-Aid for Young Scientists from MEXT, Japan (JP19K15324). YT acknowledges the Aluminium Research Grant Program of Japan Aluminium Association. The synchrotron radiation experiments were performed at the BL04B1 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2017A1851, 2017A1864, 2017A1972, 2017B1487, 2018A1451, 2018B1494 and 2018B1697).
Publisher Copyright:
© 2020 The Japan Institute of Metals and Materials
PY - 2021/2/1
Y1 - 2021/2/1
N2 - 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.
AB - 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.
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U2 - 10.2320/matertrans.MT-M2020314
DO - 10.2320/matertrans.MT-M2020314
M3 - Article
AN - SCOPUS:85100068697
SN - 1345-9678
VL - 62
SP - 167
EP - 176
JO - Materials Transactions
JF - Materials Transactions
IS - 2
ER -