Thermo-mechanical Phase Transformation of Rapidly Quenched Ti-Ni-Cu Ribbons

Yasubumi Furuya, Minoru Matsumoto, Hisamichi Kimura, Kiyoshi Aoki, Tsuyoshi Masumoto

研究成果: Article査読

37 被引用数 (Scopus)

抄録

The thermo-mechanical transformation (i.e., the shape memory effect (SME)) of a rapidly quenched Ti-Ni-Cu alloy was investigated. Some comparisons in the properties with the phase transformation (i.e., transformation temperature, thermal hysteresis, its stress dependence, ability of energy conversion, etc.) were done between rapidly quenched (RQ) Ti50Ni40Cu10(at%) ribbons and conventional polycrystalline Ti50Ni40Cu10, Ti50Ni50(at%) wires. The self-deformation associated with the phase transformation (i.e., SME) in the RQ ribbons was 3-4 times larger than that of the conventional poly crystalline alloy wires, and the hysteresis curve of strain vs temperature was narrow in shape and changed sharply at the transformation points under increasing applied stress. Since the RQ ribbons became smaller in self-defor-mation and broader in hysteresis loop by annealing at 973 K, the inferiority of SME in the recrystallized structure with grain nucleation, subsequent grain growth and lower dislocation density was confirmed. From the characterization of the conversion from thermal energy into mechanical energy, the RQ material has more efficient energy conversion ability than the recrystallized polycrystalline materials. More superior characteristics in SME will be anticipated in the microstructural region produced by more rapid solidification control.

本文言語English
ページ(範囲)504-508
ページ数5
ジャーナルMaterials Transactions, JIM
31
6
DOI
出版ステータスPublished - 1990

ASJC Scopus subject areas

  • Engineering(all)

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