Influence of Strain Rate on Deformation Properties of TiNi Shape Memory Alloy

• LIN Ping-hua

  Department of Mechanical Engineering, Southeast University

• TOBUSHI Hisaaki

  Department of Mechanical Engineering, Aichi Institute of Technology

• TANAKA Kikuaki

  Department of Aerospace Engineering, Tokyo Metropolitan Institute of Technology

• HATTORI Takeharu

  Mitsubishi Motors Co.

• IKAI Akira

  Rinnai Co.

抄録

Tensile tests with loading and unloading under various strain rates ε^^・ were performed for TiNi shape memory alloy wires at various constant temperatures. The influence of strain rate on the stress-strain-temperature relationship was investigated. The main results are summarized as follows. ( 1 ) For ε^^・ < 10%/min, the martensitic transformation stress and its reverse transformation stress did not depend on ε^^・. These stresses were almost constant in the transformation regions. ( 2 ) For ε^^・ ≧ 10 %/min, the martensitic transformation stress increased and its reverse transformation stress decreased with an increase in ε^^・. These stresses fluctuated in the transformation regions. ( 3 ) The influence of ε^^・ on the transformation stress due to R-phase transfor-mation was slight. ( 4 ) The recoverable strain energy density depended slightly on ε^^・ but increased significantly in proportion to temperature. The dissipated strain energy density depended slightly on temperature but increased in proportion to ε^^・ for ε^^・ ≧ l %/min. ( 5 ) The influence of t on deformation properties is important in the evaluation of mechanical properties of shape memory alloy elements.

収録刊行物

• JSME international journal. Ser. A, Mechanics and material engineering

  JSME international journal. Ser. A, Mechanics and material engineering 39 (1), 117-123, 1996-01-01

  一般社団法人日本機械学会

キーワード

• Inelastic Deformation
• Titanium-Nickel Shape Memory Alloy
• Martensitic Transformation
• Rhombohedral-Phase Transformation
• Strain Rate
• Stress-Strain-Temperature Relationship

詳細情報

• CRID: 1571417127134645376
• NII論文ID: 110002964441
• NII書誌ID: AA10888746
• ISSN: 09148809
• 本文言語コード: en
• データソース種別:
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