Depressurization-induced diffusionless transformation in pure iron hydrogenated under several gigapascals

Motomichi Koyama, Hiroyuki Saitoh, Toyoto Sato, Shin ichi Orimo, Eiji Akiyama

研究成果: Article査読

抄録

Phase transformation in hydrogenated iron during depressurization from several gigapascals was investigated through in-situ synchrotron radiation X-ray diffraction and post-mortem electron backscatter diffraction measurements. The hydrogenated iron under 8.6 GPa at 293 K showed a double hexagonal close-packed (dhcp) structure, and it gradually transformed into a body-centered cubic (bcc) structure with decreasing pressure. The final crystal structure consisted entirely of a bcc phase. The structural change from dhcp to bcc structure was diffusionless-type phase transformation. The bcc phase showed lath morphology and could grow during aging under a constant pressure of 1.9 GPa, which indicated that it was bainitic-type transformation that required hydrogen diffusion or desorption.

本文言語English
論文番号100078
ジャーナルMaterials Letters: X
11
DOI
出版ステータスPublished - 2021 9
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Depressurization-induced diffusionless transformation in pure iron hydrogenated under several gigapascals」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル