The low-cycle fatigue of a TiNi shape memory alloy was investigated by the rotating-bending fatigue tests in air, in water and in silicone oil. (1) The influence of corrosion fatigue in water does not appear in the region of low-cycle fatigue. (2) The temperature rise measured through an infrared thermograph during the fatigue test in air is four times as large as that measured through a thermocouple. (3) The fatigue life at an elevated temperature in air coincides with the fatigue life at the same elevated temperature in water. (4) The shape memory processing temperature does not affect the fatigue life. (5) The fatigue equation is proposed to describe the fatigue life depending on strain amplitude, temperature and frequency. The fatigue life is estimated well by the proposed equation. [S0094-4289(00)01102-6]
Low-Cycle Fatigue of TiNi Shape Memory Alloy and Formulation of Fatigue Life
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division July 27, 1998; revised manuscript received November 8, 1999. Associate Technical Editor: C. Brinson.
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Tobushi, H., Nakahara , T., Shimeno, Y., and Hashimoto, T. (November 8, 1999). "Low-Cycle Fatigue of TiNi Shape Memory Alloy and Formulation of Fatigue Life ." ASME. J. Eng. Mater. Technol. April 2000; 122(2): 186–191. https://doi.org/10.1115/1.482785
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