Effect of the cooling rate on the mechanical properties of Ti-Ni-Cu-Zr-based crystal/glassy alloys

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Ti-Ni-Cu-Zr-based crystal/glassy dual-phase alloy samples with different sizes and good mechanical properties were manufactured. The structure of these samples was examined via X-ray Diffraction, Scanning Electron Microscopy, and Transmission Electron Microscopy. The developed dual-phase structure alloys combine the high strength of glassy alloys and plasticity of crystalline alloys. Plastic deformation was enhanced by this dual-phase structure. Mechanical characterization of the alloys revealed three deformation stages, namely a martensitic transformation, dislocation slip in a crystalline phase, and shear deformation of the glassy matrix. Two types of effects involving the martensitic transformation were observed: superelastic behavior and the transformation induced plasticity (TRIP) effect, which provide an additional deformation mechanism and lead to a significant increase in the plasticity of these dual-phase samples. The results indicate that the fraction of glassy phase occurring in large rods formed at lower cooling rates is lower than that occurring in smaller rods; therefore, the deformation-induced martensitic transformation of the crystalline cP2 phase in the large samples occurs at lower stresses.

本文言語English
ページ(範囲)147-153
ページ数7
ジャーナルMaterials Science and Engineering A
704
DOI
出版ステータスPublished - 2017 9 17

ASJC Scopus subject areas

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

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