Abstract
In order to develop a brain spatula or a brain refractor made of a shape memory alloy (SMA), the bending deformation characteristics of the brain spatula of TiNi SMA made by the precision casting were discussed. The results obtained can be summarized as follows. (1) The relationship between force and deflection obtained from the cyclic three-point bending test changes slightly except for a first cycle. (2) The fatigue life in pulsating-plane bending is longer than that in alternating-plane bending. (3) The relationship between dissipated work W_d and the number of cycles to failure N_f can be expressed by a unified power function for alternating- and pulsating-plane bendings.
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