Allotropic phase transformation of pure zirconium by high-pressure torsion

Kaveh Edalati, Zenji Horita, Shunsuke Yagi, Eiichiro Matsubara

研究成果: ジャーナルへの寄稿学術誌査読

102 被引用数 (Scopus)

抄録

Pure Zr is processed by high-pressure torsion (HPT) at pressures in the range of 1-40 GPa. A phase transformation occurs from α to ω phase during HPT at pressures above ∼4 GPa while the total fraction of ω phase increases with straining and saturates to a constant level at higher strain. This phase transformation leads to microstructural refinement, hardness and strength enhancement and ductility reduction. Lattice parameter measurements confirm that c for α phase is expanded about 0.6% by the presence of ω phase. The temperature for reverse transformation from ω to α phase increases with straining and thus, straining under high pressure increases thermal stability of ω phase. The ω phase obtained by HPT is stable for more than 400 days at room temperature.

本文言語英語
ページ(範囲)277-281
ページ数5
ジャーナルMaterials Science and Engineering A
523
1-2
DOI
出版ステータス出版済み - 10月 15 2009

!!!All Science Journal Classification (ASJC) codes

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

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