TiNi形状記憶合金の回復応力 : 残留ひずみ一定下での繰返し特出

概要

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The cyclic behavior of recovery stress under constant residual strain in a TiNi shape memory alloy is investigated experimentally. The influence of residual strain and the heating temperature in the thermal cycle on cyclic characteristics of recovery stress is discussed. The main results are summarized as follows. Stress at high temperature, stress at low temperature and recovery stress decrease in the early cycles but become almost constant after these cycles. Recovery stress under the thermal cycle decreases with residual strain. Stress at high temperature depends slightly on residual strain. Both recovery stress and stress at high temperature increase with the heating temperature but the increasing rate of the stresses decreases. The amount of decrease of stress at high temperature under the thermal cycle is smaller than that of yield stress of stress-induced martensitic transformation in the pseudoelastic region.
一般社団法人日本機械学会の論文
1991-01-25