Abstract

We have analyzed the possibility of improving deformation–force properties of ring-shaped drives made of titanium nickelide and operating in the regime of two-way shape memory effect (TWSME). For this purpose, thermocycling of an oval sample was used with the transformation of the material from the low-temperature martensite phase to the high-temperature austenite phase in free state and cooling via the temperature interval of the transformation under a load. The possibility of generation of force in ring-shaped structures changing shape during heating as well as during cooling due to the TWSME process is demonstrated. The reported results indicate asymmetry of these properties relative to the direction of temperature variation. It is shown that the cooling rate substantially affects the deformation and force properties of ring-shaped drives.

中文翻译：

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在双向形状记忆效应机制下运行的环形力驱动器机械行为的特定功能

摘要

我们已经分析了改善由镍钛合金制成的环形驱动器并在双向形状记忆效应（TWSME）机制下运行的变形力特性的可能性。为此，使用椭圆形样品的热循环，使材料以自由状态从低温马氏体相转变为高温奥氏体相，并通过在负载下的转变温度间隔进行冷却。证明了由于TWSME工艺而在加热和冷却过程中在环形结构中产生力改变形状的可能性。报道的结果表明这些性质相对于温度变化方向的不对称性。结果表明，冷却速度基本上会影响环形驱动器的变形和受力性能。