TiNi形状記憶合金の変態擬弾性特性に対するひずみ速度の影響

概要

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The influence of strain rate ε on the pseudoelastic properties associated with the martensitic transformation was investigated by tensile tests for TiNi shape-memory alloy wires. The results were summarized as follows. For ε≨10%/min, the martensitic transformation stress and the dissipated work increased but the reverse transformation stress and the strain energy decreased with an increase in ε. For ε⪈2%/min, these characteristic values associated with the martensitic transformation did not depend on ε. The dependence of these pseudoelastic properties on ε was observed also after the mechanical training. In the case of designing SMA elements using the pseudoelastic properties associated with the martensitic transformation in applications of SMA, it is important to take account of the dependence of pseudoelastic properties on ε.
社団法人日本機械学会の論文
1998-05-25