K-0403 定温負荷・除荷サイクルにおけるTi-Ni形状記憶合金コイルの機能特性(S08-1 機能特性・変態)(S08 形状記憶合金の製造・加工技術と機能発現)

概要

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The deformation behavior of Ti-Ni shape memory alloy coil spring was investigated using loading-unloading cycling tests under fixed temperatures. And the effect of Ni content and shape memory treatment temperature on superelastic function was investi gated. The deformation behavior within elastic region of parent phase did not almost change during tensile cyclic loading. However, when the martensite phase was induced by stress, the deformation behavior changed largely. The critical shear stress for inducing martensites and the dissipated strain energy per unit volume decreased with increasing number of cyclic loading. The functional degradation depended on the Ni content and the shape memory treatment temperature, and increased with decreasing Ni content and increasing shape memory treatment temperature.
一般社団法人日本機械学会の論文
2001-08-22